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 .
Rainbow Falls Trail
The Rainbow Falls Trail is an American hiking trail in the Great Smoky Mountains National Park, in Sevier County, Tennessee. The trail ascends Mount Le Conte, the tallest (and sixth-highest) mountain east of the Mississippi River, and passes Rainbow Falls before absorbing the Alum Cave Trail and terminating near the LeConte Lodge.
The trail asserts itself from the beginning, immediately ascending Le Conte's flank, alongside the mountain's primary drainage avenue, LeConte Creek, which, due to the abnormally large number of mills that sprouted up along this stream at one time (twelve, at its peak), was once known as "Mill Creek". The roaring sounds of the creek accompany the footpath for most of the first , only dying down at about the mark, where the trail temporarily jaunts away from the stream. The path soon swings back, crossing over LeConte Creek twice via narrow footbridges over the final mile to Rainbow Falls. When hikers reach Rainbow Falls, they have hiked and are in the presence of the highest single-drop waterfall in the national park. On the somewhat rare occasion of a sunny afternoon at the falls, a lucky onlooker can see a rainbow reflected in the sprayed mist of the waterfall, hence the Rainbow Falls moniker.