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 .
Tugela Falls
Tugela Falls is a complex of seasonal waterfalls located in the Drakensberg ("Dragon's Mountains") of Royal Natal National Park in KwaZulu-Natal Province, Republic of South Africa. It is generally accepted as the world's second-tallest waterfall but there is an argument that it is actually the tallest waterfall in the world, rather than Venezuela's Angel Falls.