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 .
Wildcat Falls
Wildcat Falls is located at in the western quarter of Yosemite National Park alongside Highway 140, approximately 2.8 miles inside the park from the Arch Rock Entrance. It consists of a relatively thin string of falls and cascades totaling 720 feet (some sources list 630 feet), and only flows until about May or June. There are a total of seven drops in the waterfall, the longest being 120 feet. The base of the waterfall is a mossy grotto that is easily reached on foot and is a popular location among photographers.