Grand Canyon of Yellowstone
The Grand Canyon of Yellowstone is 24 miles long and between 800 and 1,200 feet deep. The Yellowstone river winds its way through the canyon eroding the hydrothermally soft and brittle rhyolite rock that forms the walls of the canyon.
The minerals in the rock, most notably iron, change colors as they are exposed to the elements creating beautiful colors throughout the canyon.
Lower Yellowstone Falls, the tallest waterfall in the park, is 308 feet tall.