This photograph of Canyon de Chelly, showing 'seven riders on horseback and dog', is one of his most celebrated images from The North American Indian.Canyon de Chelly is a National Park located in northeast Arizona, United States. Founded April 1, 1931, it preserves artifacts of the early Southwest Indian tribes that lived in the area, including the Navajo. The cliffs of the canyon are pockmarked with hand carved caves — the ruins of former villages.