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 .
List of fishes of Yellowstone National Park
The Longnose sucker "(Catostomus catostomus grieus)" is native to the Yellowstone River drainage below Yellowstone Falls. It occurs in the Lamar River, Slough Creek and Gardner River. It has been introduced into Yellowstone Lake and expanded its range into upper Yellowstone tributaries and lakes. The Longnose sucker is believed to be the longest-lived fish in the park, and that a , fish might be as old as 25 years.