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 .
Gibbon Falls
Gibbon Falls is a waterfall on the Gibbon River in northwestern Yellowstone National Park in the United States. Gibbon Falls has a drop of approximately . The falls are located roadside, upstream from the confluence of the Gibbon and Firehole Rivers at Madison Junction on the Grand Loop Road.