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 .
Eldorado Glacier
Eldorado Glacier is on the south slopes of Eldorado Peak, North Cascades National Park, in the U.S. state of Washington. The glacier is approximately in length, in width at its terminus and descends from . Eldorado Glacier is connected to Inspiration Glacier on its upper slopes. Glacial melt waters from Eldorado Glacier flow south over Roush Creek Falls, which at , is one of the tallest waterfalls in Washington.