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 .
Nohkalikai Falls
Nohkalikai Falls is the tallest plunge waterfall in India. Its height is 1115 feet (340 metres). The waterfall is located near Cherrapunji, one of the wettest places on Earth. Nohkalikai Falls are fed by the rainwater collected on the summit of a comparatively small plateau and decrease in power during the dry season in December - February. Below the falls there has formed a plunge pool with unusual green colored water.