Native American Rock Art can be found in numerous places in Arches National Park. These petroglyphs show riders on horseback and dogs along with bighorn sheep. Were the people on horses hunters or herders? Horses weren't introduced to the U.S. until the Spanish brought them in the 1500's, so this rock art was probably made by the Ute tribe in the 1600's. This is an example of man enhancing the beauty and color of Nature.