Yellowstone National Park
Yellowstone National Park has one of the world's largest petrified forests, trees which were long ago buried by ash and soil and transformed from wood to mineral materials. This ash and other volcanic debris are believed to have come from the park area itself as the central part of Yellowstone is the massive caldera of a supervolcano. The park contains 290 waterfalls of at least , the highest being the Lower Falls of the Yellowstone River at .
Eas a' Chual Aluinn
Eas a' Chual Aluinn () in the parish of Assynt, Sutherland, Highland, Scotland, is the highest waterfall in the United Kingdom with a sheer drop of 658 ft (200 m). When in full flow it is over three times higher than Niagara Falls.