Grand Canyon: Yellowstone National Park, Wyoming

The Grand Canyon of Yellowstone National Park in Wyoming is big enough to awe – 20 miles long, 1000 feet deep and 2500 feet wide – but small enough to not be completely swallowed by the landscape. Check out the V-shaped cut made by the water where the waterfall now begins and the colors that streak through the wall in the right hand side of the photo, colors caused by iron oxidation in the mostly rhyolite rocks. And although you can’t see it in this photo, there are still remnants of thermal activity steaming out of holes in the walls of the canyon.