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 .
Kinder Scout
Kinder Downfall is the tallest waterfall in the Peak District, with a 30-metre fall. It lies on the River Kinder, where it flows west over one of the gritstone cliffs on the plateau edge. The waterfall was formerly known as "Kinder Scut", and it is from this that the plateau derives its name. Although usually little more than a trickle in summer, in spate conditions it is impressive. In certain wind conditions (notably when there is a strong westerly wind), the water is blown back on itself, and the resulting cloud of spray can be seen from several miles away. Below the Downfall the River Kinder flows into Kinder Reservoir. In cold winters the waterfall freezes providing local mountaineers with an icy challenge that can be climbed with ice axes, ropes and crampons.