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  • Orange and green leaf pattern in Glacier National Park, Montana, USA. Since 1932, Canada and USA have shared Waterton-Glacier International Peace Park, which UNESCO declared a World Heritage Site (1995) containing two Biosphere Reserves (1976).
    07GLA-1439.jpg
  • A small green spider is camouflaged to match the depths of a datura flower blossom, in Anza-Borrego Desert State Park, California, USA. Spiders have eight legs and are not insects. Spiders (order Araneae, class Arachnida) are air-breathing arthropods that have chelicerae, grasping mouthparts with fangs that inject venom. Unlike spiders, insects have six legs and a pair of antennae.
    94CAL-03-08-Spider_on_Datura_flower.jpg
  • Orange jagged leaf pattern in Glacier National Park, Montana, USA. Since 1932, Canada and USA have shared Waterton-Glacier International Peace Park, which UNESCO declared a World Heritage Site (1995) containing two Biosphere Reserves (1976).
    07GLA-1438.jpg
  • Almond orchard leaves turn yellow in late November near the Sutter Buttes, Yuba City, California, USA.
    0911CA-040_almond-orchard-yellow-lea...jpg
  • Almond orchard leaves turn yellow in late November near the Sutter Buttes, Yuba City, California, USA.
    0911CA-002_almond-orchard-yellow-lea...jpg
  • Aspen leaves turn yellow in late August in Denali National Park and Preserve, Alaska.
    06AK_4211-yellow-leaves.jpg
  • Rime ice on leaves at Gunsight Pass, Glacier National Park, Montana, USA
    2209RV-0401.jpg
  • Red fall color leaves near pond. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-019.jpg
  • Scarlet colored Oregon grape leaves, Deception Pass State Park, Whidbey Island, Washington, USA. In this scenic park, an old growth evergreen forest meets the turbulent waters of Deception Pass, a strait which separates Whidbey Island from Fidalgo Island and connects Skagit Bay (part of Puget Sound), with the Strait of Juan de Fuca. Tidal current speeds reach 8 knots (9 mph) and create standing waves, large whirlpools, and roiling eddies visible from the shoreline and from spectacular Deception Pass Bridge, which spans 976 feet long, 180 feet above the water.
    1302WHI-026.jpg
  • Dwarf rhododendron leaves grow in Denali National Park and Preserve, Alaska, USA
    06AK_5006-leaf-color-pattern.jpg
  • Fog engulfs orange leaves and lichen covered trees, in a forest in Sagarmatha National Park, in the Khumbu District of Nepal. Sagarmatha National Park (created 1976) was honored as a UNESCO World Heritage Site in 1979.
    07NEP-3339.jpg
  • The last orange and yellow leaves drop in early November at the unique Natural Tunnel State Park, near Duffield, Virginia, where both a train and a river share the same natural limestone cave, measuring 850 feet (255 meters) long. The railroad has used this tunnel since 1890. Natural Tunnel began forming during the early Pleistocene Epoch and was fully formed by about one million years ago. The Glenita fault line running through the tunnel, combined with moving water and naturally forming carbonic acid may have formed Natural Tunnel through the surrounding limestone and dolomitic bedrock. After the tunnel formed and the regional water table lowered, Stock Creek diverted underground, then later took the path of least resistance through the Natural Tunnel, through Purchase Ridge, flowing south to join the Clinch River. Daniel Boone is believed to have been the first white man to see it. William Jennings Bryan (1860-1925) dubbed it the "Eighth Wonder of the World"; and the tunnel has been a tourist attraction for more than a century. Natural Tunnel State Park was created in 1967, and opened to the public in 1971. For a time, a passenger train line ran through Natural Tunnel, and today, the railroad still carries coal through it to the southeast USA. Published in "Light Travel: Photography on the Go" book by Tom Dempsey 2009, 2010.
    08VA-2041_Natural-Tunnel-SP-Virginia.jpg
  • Fungi and False Lily-of-the-Valley (Maianthemum, in the Lily Family) leaves grow together on the verdant Lake 22 trail, near Verlot on the Mountain Loop Highway, in Snohomish County, Washington, USA.
    1007L22-071.jpg
  • Reflective water drops cling to bright green leaves. Salal (Gaultheria shallon) is a leathery-leaved shrub in the heather family (Ericaceae), native to western North America. Photo from Tiger Mountain Trail, Interstate 90, Washington, USA.
    0708TIG-14_salal-water-drops.jpg
  • Leaves are silhouetted against the blue-green lake of Obersee, in Berchtesgaden National Park, Germany, Europe. Popular boat tours ply the fjord-like Königssee (King’s Lake), starting from Schönau am Königssee, near Berchtesgaden. To avoid crowds, take the first boat in the morning. At the last stop, Salet, easy walking 1–5 miles round trip lets you experience the beautiful lake of Obersee. Berchtesgaden National Park is honored by UNESCO as Berchtesgadener Land Biosphere Reserve.
    23.07ALPS-4198.jpg
  • Leaves are silhouetted against the blue-green lake of Obersee, in Berchtesgaden National Park, Germany, Europe. Popular boat tours ply the fjord-like Königssee (King’s Lake), starting from Schönau am Königssee, near Berchtesgaden. To avoid crowds, take the first boat in the morning. At the last stop, Salet, easy walking 1–5 miles round trip lets you experience the beautiful lake of Obersee. Berchtesgaden National Park is honored by UNESCO as Berchtesgadener Land Biosphere Reserve.
    23.07ALPS-4195.jpg
  • Dew drops on leaves (2021 October 19) in Heather Meadows, Mount Baker – Snoqualmie National Forest, Washington, USA.
    2110BAK-024.jpg
  • Dew drops on leaves (2021 October 19) in Heather Meadows, Mount Baker – Snoqualmie National Forest, Washington, USA.
    2110BAK-021.jpg
  • Red leaves of ground foliage in Granite Park at sunrise in John Muir Wilderness, Inyo National Forest, Eastern Sierra, California, USA. From Pine Creek Pass Trailhead, we backpacked to Honeymoon Lake and Granite Park. Day 1: backpack 6.2 miles with 2900 feet gain to Honeymoon Lake. Day 2: backpack 3.1 miles with 1300 ft gain to Granite Park. Day 3: backpack 2.7 miles with 1300 ft descent to Honeymoon Lake to set up tents; then day hike 4.4 miles round trip with 900 ft gain to Pine Creek Pass. Day 4: backpack 6.2 miles with 2900 ft descent to the trailhead.
    2108CA2-0289.jpg
  • Yellow aspen leaves in late September. Hike Maroon-Snowmass Trail #1975 from Maroon Lake to Buckskin Pass (11 miles round trip gaining 3000 feet) in Maroon Bells-Snowmass Wilderness of White River National Forest, near Aspen, Colorado, USA.
    1709US1-0326.jpg
  • Aspen leaves turn yellow at Ashcroft ghost town, 1880s silver mining buildings, near Aspen, Colorado, USA. Ashcroft ghost town was a short-lived 1880s silver mining settlement, ten miles south of Aspen, in White River National Forest. Shallow silver deposits, high transportation costs, and competition from richer lower-elevation mines in Aspen caused Ashcroft's 1880 mining boom to go bust by 1883. The silver market crash of 1893 ultimately destroyed the town's prospects. Its peak population of 2000+ plummeted to 100 by 1895. Today more people visit Ashcroft each summer than ever lived here. Founded at 9500 feet elevation, Ashcroft was originally called Castle Forks City, then Chloride until 1882. This image was stitched from multiple overlapping photos.
    1709US2-411-412-Pano_Ashcroft_CO.jpg
  • Water drops on Aspen leaves in a creek. Colorado, USA.
    1709US2-431_Ashcroft_CO.jpg
  • Aspen trees raise their fall yellow leaves to the blue sky in Maroon Bells-Snowmass Wilderness of White River National Forest. Aspen village, Colorado, USA.
    1709US2-128.jpg
  • Shadow on palm leaves in Hawaii Tropical Botanical Garden, near Hilo, Big Island, Hawaii, USA. The exquisite Hawaii Tropical Botanical Garden near Hilo is my favorite garden in the Hawaiian Islands! Delightful paths and boardwalks take you through a soothing green tropical wonderland endowed with streams (Alakahi Stream, Boulder Creek), waterfalls (Onomea Falls) and oceanfront vistas across Onomea Bay. Purchased in 1977 and transformed over 8 backbreaking years by Dan and Pauline Lutkenhouse, the garden opened to the public in 1984 and was donated to a nonprofit trust in 1995. On the Big Island, a few minutes north of Hilo off of Route 19, take the narrow four-mile Pepe'ekeo Scenic Drive which winds along coastal cliffs, across one-lane wooden bridges over picturesque waterfalls, to reach this peaceful oasis. The garden grows over 2000 plant species, representing more than 125 families and 750 genera, with diverse palms (nearly 200 species), heliconias (80+ species) and bromeliads (80+ species). Address: 27-717 Old Mamalahoa Highway, Papaikou, HI 96781, USA.
    1701HAW-2472.jpg
  • Tropical plant with orange, yellow & green leaves. Allerton Garden, on the south shore of Kauai, Hawaii, USA. Address: 4425 Lawai Rd, Koloa, HI 96756. Nestled in a valley transected by the Lawai Stream ending in Lawai Bay, Allerton Garden is one of five gardens of the non-profit National Tropical Botanical Garden (ntbg.org).
    1701HAWC-162.jpg
  • Tropical leaves on tree trunk. Manoa Falls Trail, Honolulu Watershed Forest Reserve, Oahu, Hawaii, USA. Walk 1.6 miles round trip with 800 feet gain to see Manoa Falls, a waterfall of Waihi stream in Manoa Valley. The 100-foot high Manoa Falls nestles in a lush tropical rainforest in Oahu's Koolau mountains.
    1701HAW-0242.jpg
  • Red fall color leaves. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-031.jpg
  • Orange fall color leaves by pond. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-024-Edit.jpg
  • Bench amid fall color leaves. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-022.jpg
  • Path through orange fall color leaves. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-020.jpg
  • Yellow fall color leaves by pond. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-012.jpg
  • Path through orange fall color leaves by white tree trunks. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-008.jpg
  • Path through orange fall color leaves by white tree trunks. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-007.jpg
  • Frosty leaves. Backback to Mirror Lake in Eagle Cap Wilderness,  Wallowa–Whitman National Forest, Wallowa Mountains, Columbia Plateau, northeastern Oregon, USA. Hike 7.3 miles from Two Pan Trailhead (5600 ft) up East Lostine River to camp at popular Mirror Lake (7606 ft). Day hike to Glacier Lake via Glacier Pass (6 miles round trip, 1200 ft gain). Backpack out 8.7 miles via Carper Pass, Minam Lake and West Fork Lostine. From September 11-13, 2016 Carol and I walked 22 miles in 3 days.
    1609WAL-331.jpg
  • Lupine leaves collect dew drops. Lupinus is a genus in the pea family (also called the legume, bean, or pulse family: Fabaceae or Leguminosae). Burroughs Mountain Trail, Mount Rainier National Park, Washington, USA.
    1607RAI-057.jpg
  • Fall color leaves, Letchworth State Park, Portageville, New York, USA. In Letchworth State Park, renowned as the "Grand Canyon of the East," the Genesee River roars northeast through a gorge over three major waterfalls between cliffs as high as 550 feet, surrounded by diverse forests which turn bright fall colors in the last three weeks of October. The large park stretches 17 miles between Portageville and Mount Morris in the state of New York, USA. Drive or hike to many scenic viewpoints along the west side of the gorge. The best walk is along Gorge Trail #1 above Portage Canyon from Lower Genesee Falls (70 ft high), to Inspiration Point, to Middle Genesee Falls (tallest, 107 ft), to Upper Genesee Falls (70 ft high). High above Upper Falls is the railroad trestle of Portageville Bridge, built in 1875, to be replaced 2015-2016. Letchworth's huge campground has 270 generously-spaced electric sites.
    1410NY-853_Letchworth-gorge.jpg
  • Red maple leaves on rock, White Mountain National Forest, Kancamagus H. Route 112, New Hampshire, USA. The White Mountains (a range in the northern Appalachian Mountains) cover a quarter of the state of New Hampshire. Leaf peepers love the peak of autumn foliage around the first week of October.
    1410NH-075_White-Mountains.jpg
  • Oak leaves turn shades of orange and brown in mid October around Squam Lake. Ascend West Rattlesnake Mountain (2 miles round trip) on the Old Bridle Path for an impressive view of Squam Lake, near Holderness, New Hampshire, USA. Hiking down the Pasture Trail then to the neck of Five Finger Point or beyond makes a nice loop  of 4.5+ miles, returning via Pinehurst Road to Undercut Path.
    1410NH-891_fall-colors.jpg
  • Walk through a towering forest under green and yellow leaves. Ascend West Rattlesnake Mountain (2 miles round trip) on the Old Bridle Path for an impressive view of Squam Lake, near Holderness, New Hampshire, USA. Hiking down the Pasture Trail then to the neck of Five Finger Point or beyond makes a nice loop  of 4.5+ miles, returning via Pinehurst Road to Undercut Path.
    1410NH-855_fall-colors.jpg
  • Dew beads upon lupine (lupinus) plant leaves on the Skyline Divide trail, in Mount Baker Wilderness, Mount Baker-Snoqualmie National Forest, Washington, USA.
    1309BAK-031.jpg
  • A tall tree looms behind a canopy of Japanese maple leaves in Washington Park Arboretum, Seattle, Washington, USA. Washington Park Arboretum is a joint project of the University of Washington, the Seattle Department of Parks and Recreation, and the nonprofit Arboretum Foundation.
    1210ARB-028_forest-Japanese-maples.jpg
  • A tangle of tree branches reaches green leaves to the sky in San Telmo barrio, a neighborhood in the heart of old Buenos Aires, Argentina, South America.
    05ARG-10116.jpg
  • Fireweed (Epilobium angustifolium) leaves turn purple and red in early September in Denali State Park, Alaska, USA.
    06AK_5054-fireweed.jpg
  • Alpine tundra plant leaves turn red in late August at Wonder Lake, Denali National Park, Alaska, USA.
    06AK_4092.jpg
  • Large broad leaves grow in Bellavista Cloud Forest Reserve, near Quito, Ecuador, South America.
    09ECU-2113_Bellavista-Ecuador.jpg
  • Frost patterns freeze on leaves and grass in Yosemite National Park, Sierra Nevada, California, USA.
    1111CAL-647_ice-Yosemite.jpg
  • Pistachio tree leaves turn bright yellow in fall on the Chico State campus. California State University, Chico (CSUC) is the second-oldest campus (1887) in the state's 23-campus system. The university is still commonly called "Chico State" after the 1935-1972 Chico State College and 1921-1935 Chico State Teacher's College. Chico State teaches nearly 16,000 students and is known for academic excellence in engineering, science, computing, business, technology, environmental studies, Theatre Arts, and communication.
    1111CA2-083.jpg
  • Near Maloja mountain pass, tree leaves turn orange and yellow in late summer in Sils Maria, Upper Engadine, Grison Alps, Switzerland, Europe. The Swiss valley of Engadine translates as the “garden of the En (or Inn) River” (Engadin in German, Engiadina in Romansh, Engadina in Italian).
    05ALP_7002.jpg
  • Tree leaves turn bright orange and yellow in Upper Engadine, Switzerland, the Alps, Europe. The Swiss valley of Engadine translates as the “garden of the En (or Inn) River” (Engadin in German, Engiadina in Romansh, Engadina in Italian).
    05ALP_5070-fall-color.jpg
  • In mid September, leaves turn yellow above white aspen trunks in South Fork Teton Canyon, Jedediah Smith Wilderness, Caribou-Targhee National Forest, Wyoming, USA.
    04WY-0495.jpg
  • Alpine moss, lichen, and leaves grow lushly on Fannaråken mountain in Jotunheimen National Park, Sogn og Fjordane county, Norway. Hike Fannaråken mountain in Jotunheimen National Park, Norway. Walk 15 kilometers round trip with 1170 meters gain from Turtagrø Mountain Hotel to Fannaråken mountain (or Fannaråki, 2068-meters / 6785 feet elevation) in Luster municipality, Sogn og Fjordane county, Norway.
    11NOR2-057.jpg
  • Leaves and tree trunks reflect in a puddle at Natural Tunnel State Park, near Duffield, Virginia in southeast USA.
    08VA-2032_Natural-Tunnel-SP-Virginia.jpg
  • A pattern of poplar tree trunks and yellow leaves in autumn. Little River Road on the Tennessee side of Great Smoky Mountains National Park, in southeastern USA.
    08TN-2158_Great-Smoky-Mountains-NP.jpg
  • Little River Road passes through tunnels of yellow poplar leaves in autumn on the Tennessee side of Great Smoky Mountains National Park, in southeastern USA.
    08TN-2157_Great-Smoky-Mountains-NP.jpg
  • One of the largest masses of granite in the Eastern United States, Looking Glass Rock is excellent for rock climbing and gets its name from the shimmering effects of sunlight on its surface when wet. This "pluton monolith" crystallized from magma .slowly cooling below the surface. .Fall leaves color the Blue Ridge Mountains (a subset of the Appalachian Mountains) at Log Hollow Overlook (elevation 4445 feet) at Milepost 416.0 of the Blue Ridge Parkway, in North Carolina. Local trees release hydrocarbons into the atmosphere and create a characteristic blue haze. The Blue Ridge Parkway is a 469-mile (755 km) long scenic highway that connects Shenandoah National Park, Virginia, with the Great Smoky Mountains National Park in North Carolina, following ridge crestlines and the Appalachian Trail. Panorama stitched from 3 overlapping photos.
    08NC-2435-2437pan_Looking-Glass-Rock.jpg
  • One of the largest masses of granite in the Eastern United States, Looking Glass Rock is excellent for rock climbing and gets its name from the shimmering effects of sunlight on its surface when wet. This "pluton monolith" crystallized from magma .slowly cooling below the surface. .Fall leaves color the Blue Ridge Mountains (a subset of the Appalachian Mountains) at Log Hollow Overlook (elevation 4445 feet) at Milepost 416.0 of the Blue Ridge Parkway, in North Carolina. Local trees release hydrocarbons into the atmosphere and create a characteristic blue haze. The Blue Ridge Parkway is a 469-mile (755 km) long scenic highway that connects Shenandoah National Park, Virginia, with the Great Smoky Mountains National Park in North Carolina, following ridge crestlines and the Appalachian Trail.
    08NC-2434.jpg
  • One of the largest masses of granite in the Eastern United States, Looking Glass Rock is popular for rock climbing and gets its name from the shimmering effects of sunlight on its surface when wet. Fall leaves turn orange and red in the Blue Ridge Mountains (a subset of the Appalachian Mountains) at View Cherry Cove (elevation 4327 feet) at Milepost 415.0 of the Blue Ridge Parkway, in North Carolina. Local trees release hydrocarbons into the atmosphere and create a characteristic blue haze. The Blue Ridge Parkway is a 469-mile (755 km) long scenic highway that connects Shenandoah National Park, Virginia, with the Great Smoky Mountains National Park in North Carolina, following ridge crestlines and the Appalachian Trail.
    08NC-2432.jpg
  • Leaves turn bright yellow and orange in late October at the main campground in Mammoth Cave National Park in Edmonson County, Kentucky, USA.
    10MAM-155.jpg
  • A car drives Flint Ridge Road through a tunnel of orange, yellow, and green fall leaves in Mammoth Cave National Park, Kentucky, USA.
    10MAM-123.jpg
  • Stairs descend the Historic Entrance of Mammoth Cave, surrounded by trees with yellowing fall leaves. Mammoth Cave National Park was established in 1941 in Edmonson County, Kentucky, USA and was declared a UNESCO World Heritage Site in 1981 and international Biosphere Reserve in 1990. With over 390 miles (630 km) of passageways, the Mammoth-Flint Ridge Cave System is the longest known in the world. Mammoth Cave developed in thick Mississippian-aged limestone strata capped by a layer of Big Clifty Sandstone. Descending limestone layers include the Girkin Formation, Saint Genevieve Limestone, and Saint Louis Limestone. Panorama stitched from 6 overlapping photos.
    10MAM-112-117pan_Mammoth-Cave-KY.jpg
  • Stairs descend the Historic Entrance of Mammoth Cave, surrounded by trees with yellowing fall leaves. Mammoth Cave National Park was established in 1941 in Edmonson County, Kentucky, USA and was declared a UNESCO World Heritage Site in 1981 and international Biosphere Reserve in 1990. With over 390 miles (630 km) of passageways, the Mammoth-Flint Ridge Cave System is the longest known in the world. Mammoth Cave developed in thick Mississippian-aged limestone strata capped by a layer of Big Clifty Sandstone. Descending limestone layers include the Girkin Formation, Saint Genevieve Limestone, and Saint Louis Limestone. Panorama stitched from 8 overlapping photos.
    10MAM-103-110pan_Mammoth-Cave-KY.jpg
  • Stairs descend the Historic Entrance of Mammoth Cave, which drips with water and is surrounded by trees with yellowing fall leaves. Mammoth Cave National Park was established in 1941 in Edmonson County, Kentucky, USA and was declared a UNESCO World Heritage Site in 1981 and international Biosphere Reserve 1990. With over 390 miles (630 km) of passageways, the Mammoth-Flint Ridge Cave System is the longest known in the world. Mammoth Cave developed in thick Mississippian-aged limestone strata capped by a layer of Big Clifty Sandstone. Descending limestone layers include the Girkin Formation, Saint Genevieve Limestone, and Saint Louis Limestone.
    10MAM-092-p1.jpg
  • Stairs descend the Historic Entrance of Mammoth Cave, surrounded by trees with yellowing fall leaves. Mammoth Cave National Park was established in 1941 in Edmonson County, Kentucky, USA and was declared a UNESCO World Heritage Site in 1981 and international Biosphere Reserve in 1990. With over 390 miles (630 km) of passageways, the Mammoth-Flint Ridge Cave System is the longest known in the world. Mammoth Cave developed in thick Mississippian-aged limestone strata capped by a layer of Big Clifty Sandstone. Descending limestone layers include the Girkin Formation, Saint Genevieve Limestone, and Saint Louis Limestone. Panorama stitched from 4 overlapping photos.
    10MAM-078-81pan_Mammoth-Cave-KY.jpg
  • Maple leaves turn from green to yellow orange in late September, against a backdrop of fractured bedrock along the Lake Superior shoreline in Porcupine Mountains Wilderness State Park, Michigan, USA. The park was established in 1945 to protect the last large stand of uncut hardwood-hemlock forest remaining in the Midwest.
    03MI-G0050-Lake-Superior-shore.jpg
  • Leaves of late fall litter Sugar Creek in Turkey Run State Park, in historic Parke County, Indiana, USA. Rocky Hollow Falls Canyon Nature Preserve is a National Park Service Registered Natural Landmark. The Mansfield sandstone bedrock was formed during the Carboniferous Period when sand layers at the mouth of ancient Michigan River was compacted and cemented into solid rock. Ancient swamps became coal seams which were mined in the late 1800s and early 1900s. Glacial meltwater erosion in the Pleistocene Epoch carved today's canyons and potholes.
    10IND-227.jpg
  • Bunchberry (Cornus canadensis, or Dwarf Dogwood, or Dwarf Cornel, or Crackerberry)  flowers blooms amid heart-shaped leaves of False Lily-of-the-Valley (Maianthemum, in the Lily Family) on the verdant Lake 22 trail, near Verlot on the Mountain Loop Highway, in Snohomish County, Washington, USA.
    1007L22-081.jpg
  • Back lit, green vine maple leaves grow along Elliott Creek, Mt. Baker-Snoqualmie National Forest, Goat Lake Trail number 647, Washington, USA.
    0907GOA-044.jpg
  • False Lily-of-the-Valley (Maianthemum, in the Lily Family) bloom from heart-shaped leaves in the verdant Central Cascades of Washington, USA. Hike to Lake 22 on .the Mountain Loop Highway near Verlot Visitor Center, in Mount Baker - Snoqualmie National Forest.
    05L22_069-False-Lily-Maianthemum.jpg
  • False Lily-of-the-Valley (Maianthemum, in the Lily Family) grows with heart shaped leaves in the verdant Central Cascades of Washington, USA. Hike to Lake 22 on the Mountain Loop Highway near Verlot Visitor Center, in Mount Baker - Snoqualmie National Forest.
    05L22_062.jpg
  • Reflective water drops cling to bright green leaves. Salal (Gaultheria shallon) is a leathery-leaved shrub in the heather family (Ericaceae), native to western North America. Photo from Tiger Mountain Trail, Interstate 90, Washington, USA.
    0708TIG-08_salal-water-drops.jpg
  • Vine Maple (Acer circinatum) leaves turn yellow gold in late summer and autumn. Photographed on the Mount Defiance Trail, Interstate 90, Washington, USA.
    0708DEF-013-vine-maple.jpg
  • Big Leaf Maple (Acer macrophyllum) leaves cast green shadows on the verdant Lake Serene Trail in Mt. Baker-Snoqualmie National Forest, Washington, USA.
    0707SER-056-Big-Leaf-Maple.jpg
  • Vine Maple leaves turn bright yellow and orange in Wenatchee National Forest in early October, Washington, USA.
    04POL-0009.jpg
  • A yellow violet (Family Violaceae) flowers yellow with maroon veins, leaves evergreen. Photo from the Pacific Crest Trail between Rainy Pass (Highway 20) and Cutthroat Pass, Okanagon National Forest, Washington, USA.
    0907-239.jpg
  • A stairway ascends through forest, ferns, maple leaves, fall foliage. Washington Park Arboretum, a joint project of the University of Washington, the Seattle Department of Parks and Recreation, and the nonprofit Arboretum Foundation.
    0911ARB-06.jpg
  • A stairway ascends through forest, ferns, maple leaves, fall foliage. Washington Park Arboretum, a joint project of the University of Washington, the Seattle Department of Parks and Recreation, and the nonprofit Arboretum Foundation.
    0911ARB-04.jpg
  • Japanese maple tree leaves glow yellow and red in fall. Washington Park Arboretum, a joint project of the University of Washington, the Seattle Department of Parks and Recreation, and the nonprofit Arboretum Foundation.
    0911ARB-03.jpg
  • Japanese maple tree leaves glow yellow and red in fall. Washington Park Arboretum, a joint project of the University of Washington, the Seattle Department of Parks and Recreation, and the nonprofit Arboretum Foundation.
    0911ARB-02.jpg
  • Leaves are silhouetted against the blue-green lake of Obersee, in Berchtesgaden National Park, Germany, Europe. Popular boat tours ply the fjord-like Königssee (King’s Lake), starting from Schönau am Königssee, near Berchtesgaden. To avoid crowds, take the first boat in the morning. At the last stop, Salet, easy walking 1–5 miles round trip lets you experience the beautiful lake of Obersee. Berchtesgaden National Park is honored by UNESCO as Berchtesgadener Land Biosphere Reserve.
    23.07ALPS-4199.jpg
  • Dew drops on leaves (2021 October 19) in Heather Meadows, Mount Baker – Snoqualmie National Forest, Washington, USA.
    2110BAK-023.jpg
  • Mountain snowberry (Gaultheria depressa) plant with red leaves along the Sealy Tarns Track, in Aoraki / Mount Cook National Park, Canterbury region, South Island, New Zealand. In 1990, UNESCO honored Te Wahipounamu - South West New Zealand as a World Heritage Area.
    1901NZ1-0868.jpg
  • A spread of red spotted leaves in autumn. Cadillac Heritage Nature Study Area, William Mitchell State Park, Cadillac, Michigan, USA. Walk the pleasant 2.5-mile Heritage Nature Trail on boardwalks and packed limestone starting from Carl T. Johnson Hunting and Fishing Center, through old-growth hardwood forest then around an old dike system which retains rich wetlands.
    1610MI-028.jpg
  • Vine leaves overgrow a wall-sized child photo on the side of a building in Stein am Rhein, in Schaffhausen Canton, Switzerland, Europe.
    16SWI-0153.jpg
  • Pine needles and leaves float on water surface. Diana's Baths are a collection of beautiful pools and waterfalls descending 75 feet (23 m) vertically along Lucy Brook on North Moat Mountain, in White Mountain National Forest, New Hampshire, USA. The easy 1.2-mile roundtrip walk starts at the Diana's Baths parking lot on West Side Road in Bartlett, near North Conway. An 1800s sawmill operation here was abandoned by the Lucy family in the 1940s then converted into a historic site protected by the US Forest Service. The White Mountains (a range in the northern Appalachian Mountains) cover a quarter of the state of New Hampshire. Leaf peepers enjoy the peak of autumn foliage around the first week of October.
    1410NH-264_White-Mountains.jpg
  • Fall leaves. Hike Mount Jo in the Adirondack Mountains, near Lake Placid, North Elba, New York, USA.
    1410NY-020_Adirondacks.jpg
  • A green alpine plant defends itself with sharp jagged leaves in the Andes Mountains, Peru, South America.
    00PER-Sharp-Alpine-Plant.jpg
  • A lupine flower blooms from green leaves, in Sawtooth National Recreation Area, Idaho, USA. Lupines or lupins (Genus: Lupinus) are in the Fabaceae or Leguminosae Family (also called the legume, pea, bean, or pulse family of flowering plants).
    07SAW-1079.jpg
  • Fireweed (Epilobium angustifolium) leaves turn red in early September in Denali State Park, Alaska, USA.
    06AK_5052-fireweed.jpg
  • Caterpillars feast on green leaves in Western Australia. Stirling Range National Park was declared in 1913 and is now an ecological island in a sea of farmland. 1500 species of flora are packed within the park, more than in the entire British Isles. 123 orchid species grow here. 87 plant species found in the Stirling Range occur nowhere else on earth.
    04AUS-11152_caterpillars.jpg
  • A crawling insect with knobby white shell eats leaves in Bellavista Cloud Forest Reserve, near Quito, Ecuador, South America.
    09EQUCIMG_3000_Bellavista-Ecuador.jpg
  • Aspen leaves turn gold in autumn along the Icefields Parkway in Banff National Park, Alberta, Canada. This is part of the Canadian Rocky Mountain Parks World Heritage Site declared by UNESCO in 1984.
    03CAN-G0055_Bicycling-Banff.jpg
  • Leaves turn yellow in the fall by white aspen trunks in Granite Canyon, Grand Teton National Park, Wyoming, USA.
    04WY-0386.jpg
  • Fog, orange leaves, and lichen covered trees, in a forest in Sagarmatha National Park, in the Khumbu District of Nepal. Sagarmatha National Park (created 1976) was honored as a UNESCO World Heritage Site in 1979.
    07NEP-3357.jpg
  • Leaves turn bright yellow and orange in late October at the main campground in Mammoth Cave National Park in Edmonson County, Kentucky, USA.
    10MAM-160.jpg
  • Stairs descend the Historic Entrance of Mammoth Cave, which drips with water and is surrounded by trees with yellowing fall leaves. Mammoth Cave National Park was established in 1941 in Edmonson County, Kentucky, USA and was declared a UNESCO World Heritage Site in 1981 and international Biosphere Reserve in 1990. With over 390 miles (630 km) of passageways, the Mammoth-Flint Ridge Cave System is the longest known in the world. Mammoth Cave developed in thick Mississippian-aged limestone strata capped by a layer of Big Clifty Sandstone. Descending limestone layers include the Girkin Formation, Saint Genevieve Limestone, and Saint Louis Limestone.
    10MAM-102.jpg
  • Big leaves turn yellow in the first half of October on the trail to Janus Lake and Union Gap, near Smithbrook Road off Highway 2, northwest of Leavenworth, Washington, USA.
    05JAN_05.jpg
  • Leaves of Gambel oak (Quercus gambelii) turn red and yellow in late September on Step House Trail on Wetherill Mesa in Mesa Verde National Park, a UNESCO World Heritage Site in Montezuma County, Colorado, USA. The park protects some of the best-preserved Ancestral Puebloan archaeological sites in the United States. It was established by Congress and President Theodore Roosevelt in 1906 near the Four Corners region of the American Southwest. Starting around 7500 BCE, Mesa Verde was seasonally inhabited by nomadic Paleo-Indians. Later, Archaic people established semi-permanent rockshelters in and around the mesa. By 1000 BCE, the Basketmaker culture emerged from the local Archaic population, and by 750 CE the Ancestral Puebloans had developed from the Basketmaker culture. The Mesa Verdeans survived using a combination of hunting, gathering, and subsistence farming of crops such as corn, beans, and squash. They built the mesa's first pueblos sometime after 650, and by the end of the 1100s began building massive cliff dwellings. By 1285, following a period of social and environmental instability driven by a series of severe and prolonged droughts, they abandoned the area and moved south into what is today Arizona and New Mexico.
    1909US1-3554.jpg
  • False Lily-of-the-Valley (Maianthemum, in the Lily Family) grows with heart shaped leaves. Hike the Bluff Trail in Ebey's Landing National Historical Reserve, on Whidbey Island, Washington, USA.
    1604WHI-619.jpg
  • Leaves of various tree species change color from green to yellows and reds in late September amid a pattern of tree trunks, in Porcupine Mountains Wilderness State Park, Michigan, USA. The park was established in 1945 to protect the last large stand of uncut hardwood-hemlock forest remaining in the Midwest.
    03MI-G0063-fall-color-trees-Michigan.jpg
  • A quiet pool of water in a stream covers round stones and reflects green leaves and blue sky. Washington, USA.
    05L22_100.jpg
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