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 .
Big Manitou Falls
Big Manitou Falls is a waterfall on the Black River, a tributary of the Nemadji River. The falls are within Pattison State Park in Douglas County, Wisconsin, about 13 miles south of Superior. At 165 feet, Big Manitou Falls is the highest waterfall in Wisconsin. Native Americans who settled nearby believed they heard the voice of the Great Spirit within the roaring of the falls and gave it the name "Gitchee Manitou". In 1920, a state park was created around the falls, and it received a further level of protection in 2003 upon being named a unit of the Wisconsin State Natural Areas Program.