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 .
Crabtree Falls
Crabtree Falls is one of the tallest sets of waterfalls in the United States east of the Mississippi River. It is located in the George Washington National Forest in Nelson County, Virginia, off of Virginia State Route 56. The name of the falls is thought to have come from William Crabtree, who settled in this part of Virginia in 1777. L.A. Snead, former US Assistant Fuel Administrator (WWI), environmentalist and notable Nelsonian, spearheaded negotiations to secure land surrounding Crabtree Falls after it was almost developed as a resort area in the late 1960s. Using personal and Congressional funds, the land deals were completed and the deeds transferred by LA Snead on June 3, 1968, to the National Forest System. This assured benefit for future generations of this magnificent Nelson County treasure.