The American Southwest is a geological time machine. 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 petroglyphs hidden in tribal lands. With its brilliant light, red desert rock, cobalt blue skies, golden cotton woods and white-barked Aspens, the American Southwest is a photographer's playground.