In this episode of Travels to the Edge with Art Wolfe, Art visits the geologic time capsule of the American Southwest. Its bizarre and beautiful rock formations are the result of eons of erosion. In Utah’s Zion National Park, Art explores surreal slot canyons carved from wind and water and encounters the strange rock spires—hoodoos—that punctuate the landscape like giant exclamation points. In Arizona’s Canyon de Chelly, he goes by horseback with a Navajo guide to discover petraglyphs hidden in tribal lands. With its brilliant light, red desert rock, cobalt blue skies, golden cottonwoods and white-barked aspens, the American Southwest is a photographer’s playground. See Art's video introduction to this program.