The Central Utah Slot Canyons are located in a remote and seldom seen portion of Palo Duro Canyon. The beautiful rock structures are found in a series of three slot canyons - Upper, Middle, and Lower Slots. This is a view of the Lower Slot Canyon as warm morning sunlight filters in through the sandstone walls. Over the course of an hour, the walls seemed to change from a purple glow to an orange glow as the indirect sunlight progressed through the canyon. Photo © copyright by Rob Greebon.