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 .
Taughannock Falls State Park
Taughannock Falls' main cataract is a , making it taller than Niagara Falls. It is the tallest single-drop waterfall east of the Rocky Mountains. The waterfall is located along Taughannock Creek, which flows through a long gorge with cliffs up to high.