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 .
Wallaman Falls
The Wallaman Falls, a cascade and horsetail waterfall on the Stony Creek, is located in the UNESCO World Heritagelisted Wet Tropics in the northern region of Queensland, Australia. The waterfall is notable for its main drop of , which makes it the country's tallest single-drop waterfall. The pool at the bottom of the waterfall is deep. An estimated people visit the waterfall annually.