This photo, taken on Dec. 31, 2000, shows Utah's Green River flowing south across the Tavaputs Plateau before entering Desolation Canyon, according to the USGS. Desolation Canyon is a popular river-rafting spot in Utah. It is noted for its rock art sites and Native American ruins. However, it was not a popular site with settlers in the 19th century, as many found the terrain too wild to cultivate.