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  • Emergency tidal escape platform. Visit Hopewell Rocks (Flowerpot Rocks) at Hopewell Cape, near Moncton, New Brunswick, Canada. Hopewell Rocks have one of most extreme tidal ranges in the world: up to 16 meters (52 feet) vertically. Waves and tides twice per day have eroded the base of the rocks faster than the tops, leaving arches and curiously shaped formations of dark sedimentary conglomerate and sandstone rock. For best photo lighting, go in morning (or spectacular sunrise) during the first low tide of the day, safe for 3 hours before low tide until 3 hours after. Walking the beach is easy until its southern end, where The Ledges, a ridge of slippery limestone, can be clambered over to reach Demoiselle Beach. Bay of Fundy has the highest tidal range in the world, due to a resonance of being just the right length (270 km) matching the gravitational pushing cycle of the Moon that causes the tides. Due to the bay's optimal size, the time it takes a large wave to go from the mouth of the bay to the inner shore and back is practically the same as the time from one high tide to the next. (See the effect of resonance by steadily pushing a long pan of water back and forth: an optimal pushing frequency for a given pan size will build up a high wave of water which sloshes out; but pushing too fast or too slow won't build up the big wave.) Two high tides occur per day, one when the ocean side of the Earth is nearest the Moon, and one on the side most distant from the Moon, about 12 hours and 25 minutes from one high tide to the next. The Bay of Fundy is on the Atlantic coast of North America, on the northeast end of the Gulf of Maine between the Canadian provinces of New Brunswick and Nova Scotia. Address: Hopewell Rocks Ocean Tidal Exploration Site (phone 506-734-3429), 131 Discovery Rd, Hopewell Cape, NB E4H 4Z5.
    1410CAN-649_Hopewell_Bay-of-Fundy.jpg
  • On Mount Rainier (14,411 feet elevation or 4392 meters), a climber at 12,000 feet ascends Emmons Glacier, which terminates 7,000 feet below in the White River which flows northwest into Puget Sound. Watersheds in the upper right flow south into the Columbia River. Little Tahoma (11,138 feet) rises at right.  Permitted climbers can ascend Mount Rainier via the Camp Sherman route starting at White River Campground, in Mount Rainier National Park, Washington, USA. Published in "Light Travel: Photography on the Go" book by Tom Dempsey 2009, 2010.
    82RAI-99-01-EmmonsGlacierClimber_16-...jpg
  • This giant boulder tumbled from cliffs above and nicked the corner of this restroom at Sabrina Campground, in Inyo National Forest, Mono County, California, USA.
    20200726_114652.jpg
  • The James Caird lifeboat is launched from the shore of Elephant Island in the South Shetland Islands on 24 April 1916. This photograph, probably captured by expedition photographer Frank Hurley, was published in the United States in Ernest Shackleton's 1919 book, "South," from William Heinemann publishing house of London. The voyage of the James Caird, one of history's greatest small-boat journeys, was by open whaleboat from Elephant Island to South Georgia in the southern Atlantic Ocean, a distance of 800 nautical miles (1500 km; 920 mi) across one of the world' s most treacherous seas. Undertaken by expedition leader Sir Ernest Shackleton and five companions, its objective was to obtain rescue for the main body of the Imperial Trans-Antarctic Expedition of 1914-17, trapped on Elephant Island after the loss of their ship Endurance. On the temporary haven of Elephant Island, the expedition's carpenter, Harry McNish, improvised tools and materials to adapt the 22.5-foot (6.9 m) long James Caird, raising its sides and building a makeshift deck of wood and canvas, sealing the work with oil paints, lamp wick, and seal blood. The craft was further strengthened with a mast lashed inside along the length of her keel, and fitted with a mainmast and a mizzenmast, rigged to carry lugsails and a jib. Boat weight was increased by 1 long ton (1016 kg) of ballast, to lessen the risk of capsizing in the high seas that Shackleton knew would be encountered. (This photo is in the public domain in the United States because its first publication occurred prior to January 1, 1923.)
    1916ANT_Shackleton_Elephant-Island_J...jpg
  • A solo hiker walks atop the Pulpit Rock (Prekestolen) 1959 feet above a car ferry on Lysefjord, Forsand municipality, Rogaland county, Ryfylke traditional district, Norway, Europe. The nearest city is Jørpeland, in Strand municipality. Published in Wilderness Travel Catalog of Adventures 1998, 1996, 1988. Winner of "Honorable Mention, Photo Travel Division" in Photographic Society of America (PSA) Inter-Club Slide Competition May 1988. Published 2009 on a commercial web site in Amsterdam. Published in "Light Travel: Photography on the Go" book by Tom Dempsey 2009, 2010.
    81NOR-08-14-The-Pulpit_Prekestolen.jpg
  • Our trekkers crossed a makeshift bridge over a stream near Deurali, Nepal. .Published in 2009 on Swedish trekking company site www.adventurelovers.se.
    07NEP-2120.jpg
  • Take care crossing Boomerang Slip, in Taranaki / Mount Egmont National Park, New Zealand, North Island
    07NZ_6144_Boomerang-Slip.jpg
  • "Pull out canoes here - Danger ... Waterfall ahead" sign at Bowron Lake Provincial Park, British Columbia, Canada. On the 73-mile Bowron canoeing trip, paddle a rectangular circuit of wilderness lakes and portage your canoe rolled on wheels. The Cariboo Mountains are the northernmost subrange of the Columbia Mountains.
    93BOW_danger-sign.jpg
  • A wigged cow skull says "zona peligro" (danger zone) in Huanacpatay Valley, Cordillera Huayhuash, Andes, Peru, South America. Day 6 of 9 days trekking around the Cordillera Huayhuash.
    14PER-4455_cow-skull-peligro.jpg
  • A "DANGER GASSY AREA" sign marked propane storage at the former John Fluke vacation property on Vendovi Island, Skagit County, Washington, USA. Vendovi Island was named after a Fijian High Chief Ro Veidovi who was brought to North America by the 1841 Wilkes Expedition. The San Juan Preservation Trust, a land trust for conservation in the San Juan Islands, purchased the island in December 2010 from the family of John Fluke Sr. Vendovi Island lies across Samish Bay from mainland Skagit County, between Guemes Island and Lummi Island, in the Salish Sea.
    1205VEN-033_Vendovi-Island.jpg
  • The hoary marmot (Marmota caligata) is the largest North American ground squirrel and is often nicknamed "the whistler" for its high-pitched warning issued to alert other members of the colony to possible danger. Hike the Garden Wall trail from Logan Pass in Glacier National Park, Montana, USA. Published in 2013 for "Ranger Rick, Jr. Appventures: Bears App".
    10GLA-2143.jpg
  • Signs at Hanakapiai Beach on Kalalau Trail warn of dangerous surf. Na Pali Coast, Kauai, Hawaii, USA. A beautiful day hike along the slippery Kalalau Trail goes from Ke'e Beach to Hanakapiai Beach, with a rougher side trip to impressive Hanakapiai Falls, in Na Pali Coast State Wilderness Park on the island of Kauai. To reach Hanakapiai Valley's waterfall, follow the signed clay trails for a moderately strenuous 8.8 miles round trip with 2200 feet cumulative gain (measured on my GPS), and bring plenty of fresh water. I recommend boots with sturdy tread, hiking poles, plus water shoes for the several stream crossings. Arrive early to get parking at the trailhead in Haena State Park at the end of the Kuhio Highway (Hawaii Route 560). The gorgeous Kalalau Trail was built in the late 1800s to connect Hawaiians living in the remote valleys. No permit is needed for day hiking to Hanakapiai Falls. But hikers going onwards from Hanakapiai Beach to Hanakoa and Kalalau Valleys require a camping permit from the Hawaii Department of Land and Natural Resources (HDLNR).
    1701HAW-0957.jpg
  • Pinkham Notch fall colors. Mount Washington is famous for dangerously erratic weather and one of the highest wind gusts ever measured at the Earth's surface, 231 mph (372 km/h or 103 m/s), in 1934. See Mount Washington (6288 ft, highest in northeast USA) above Pinkham Notch on Vermont Route 16, in the Presidential Range, White Mountain National Forest, 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-192_White-Mountains.jpg
  • Mount Washington is famous for dangerously erratic weather and one of the highest wind gusts ever measured at the Earth's surface, 231 mph (372 km/h or 103 m/s), in 1934. See Mount Washington (6288 ft, highest in northeast USA) above Pinkham Notch on Vermont Route 16, in the Presidential Range, White Mountain National Forest, 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-191_White-Mountains.jpg
  • A yellow sign warns of glacier ice falling, creating a wave, and submerging a person in dangerous water, at Fox Glacier, South Island, New Zealand. As of 2012, both the Fox and Franz Josef Glaciers are more than 2.5 kilometers (1.6 miles) shorter than a century ago. Fox Glacier retreated throughout most of the last 100 years, advanced from 1985-2009, then began retreating again. In 1990, UNESCO honored Te Wahipounamu - South West New Zealand as a World Heritage Area.
    07NZ_0127-Fox-Glacier.jpg
  • A yellow sign warns of glacier ice falling, creating a wave, and submerging a person in dangerous water, at Fox Glacier, South Island, New Zealand. As of 2012, both the Fox and Franz Josef Glaciers are more than 2.5 kilometers (1.6 miles) shorter than a century ago. Fox Glacier retreated throughout most of the last 100 years, advanced from 1985-2009, then began retreating again. In 1990, UNESCO honored Te Wahipounamu - South West New Zealand as a World Heritage Area. Panorama stitched from 2 overlapping images.
    07NZ_0120-21pan-Fox-Glacier_sign.jpg
  • The Blue Spotted Stingray or Taeniura lymma is part of the shark family. This saltwater fish is found in the West Pacific, East Africa, Red Sea, East Africa, Japan and parts of southern Australia. Photographed in the Vancouver Aquarium, 845 Avison Way, Vancouver, British Columbia, V6G 3E2 CANADA. It feeds on crustaceans around coral reefs in relatively shallow water of up to 65 feet. These Stingrays can grow to about 14 inches in width and over 3 feet in length with tail. They are often found in groups and can be buried in the sand. The large tail spine is dangerous and can sometimes cause deadly blood loss.
    1402VAN-370.jpg
  • A hippopotamus or hippo (Hippopotamus amphibius scientific name; from the Greek hippopotamos, hippos meaning horse and potamus meaning river), is a large, mostly plant-eating African mammal, one of only two extant species in the family Hippopotamidae (the other being the Pygmy Hippopotamus). The hippo is semi-aquatic, inhabiting rivers and lakes in sub-Saharan Africa in groups of 5-30 hippos. During the day they remain cool by staying in the water or mud; reproduction and childbirth both occur in water, where territorial bulls preside over a stretch of river. They emerge at dusk to graze on grass. While hippos rest near each other in territories in the water, grazing is a solitary activity and hippos are not territorial on land. Despite their physical resemblance to pigs and other terrestrial even-toed ungulates, their closest living relatives are cetaceans (whales, porpoise, etc.). The common ancestor of whales and hippos split from other even-toed ungulates around 60 million years ago. The earliest known hippopotamus fossils, belonging to the genus Kenyapotamus in Africa, date to around 16 million years ago. The hippopotamus is recognizable for its barrel-shaped torso, enormous mouth and teeth, hairless body, stubby legs and tremendous size. Hippos have been clocked at 30 mph (48 km/h) while running short distances, faster than an Olympic sprinter. The hippopotamus is one of the most aggressive animals in the world, and are often regarded as the most dangerous animal in Africa. There are an estimated 125,000 to 150,000 hippos remaining throughout Sub-Saharan Africa, of which Zambia (40,000) and Tanzania (20,000-30,000) have the largest populations. They are still threatened by poaching for their meat and ivory canine teeth, and by habitat loss. Photographed in the Woodland Park Zoo, Seattle, Washington.
    0809ZOO-226.jpg
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