Toroweap, Vulcan's Throne, Grand Canyon, Epic, Colorado River, Lightning, Grand Canyon National Park, Monsoon, rain, rain curtain, cliff, edge, abyss, America, American, USA, Southwest, American Southwest, Arizona, landmark, notable, National Park, scenic, scenery, landscape, red rocks, sandstone, geology, geological, formation, desert, outdoors, sand, arid climate, no people, rock formations, rock, rocks, nature, natural elements, American West, Canyon, canyons, inspiration, inspirational, inspiring, erosion, erosional, differential erosion, geologic formations, habitat, park, parks, eroded, weathering, weathered