South Window Arch at Sunrise, Arches National Park – Utah
South Window Arch at Sunrise in Arches National Park, outside of Moab, Utah. Part of Colorado Plateau, and the Desert Southwest. The geologic Entrada sandstone layer that covers much of the park is ideal for creating natural sandstone arches over thousands and millions of years, through a combination of wind and water erosion, as well as the seasonal freeze and thaw cycle.