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 .
Roush Creek Falls
Roush Creek Falls is a steep cascade in North Cascades National Park, Washington, U.S. Glacial melt waters from Eldorado Glacier flow south creating Roush Creek. Not far from its origination, Roush Creek flows over Roush Creek Falls, which at , is one of the tallest waterfalls in Washington.