At the unique Natural Tunnel State Park, near Duffield, Virginia, both a train and a river share the same natural limestone cave, measuring 850 feet (255 meters) long, since 1890. Natural Tunnel began forming during the early Pleistocene Epoch and was fully formed by about one million years ago. Daniel Boone is believed to have been the first white man to see it. William Jennings Bryan (1860-1925) dubbed this tourist attraction as the "Eighth Wonder of the World." Natural Tunnel State Park was created in 1967 and opened to the public in 1971. A passenger train line ran through Natural Tunnel for a time and today, coal is still carried through by rail to the southeast USA.