Stock photography, photos: Rainbow Bridge National Monument Stock photos of Rainbow Bridge National Monument, the world's largest natural bridge. Photograph: © Jim Parkin Click for a larger image and more information Keywords associated with this stock photo: usa, us, america, united states, southwest, desert, az, arizona, ut, utah, glen canyon, colorado river, national recreation area, nra, rainbow bridge, arch, sandsotne, national monument, lake powell, navajo nation, bridge canyon, erosion, cross