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 .
Snow Creek Falls
Snow Creek Falls is a long series of cascades located in Yosemite National Park toward the eastern extent of Yosemite Valley. It descends a steep gorge on a sizeable stream that originates in May Lake to the north, dropping east of the trail that leaves the Valley above Mirror Lake en route to North Dome and other north-rim destinations. Snow Creek Falls is the second highest waterfall in Yosemite National Park.