The orange and blue hues of the Upper Central Utah Slot Canyon glow in the early November light. These sandstone canyons were cut by flowing water over millions of years. This area of Palo Duro Canyon is pristine and untouched by humans, and few people even know of this canyon's whereabouts. Comprised of three small slot canyons, this image shows the exit of the Upper slot canyon with the blue sky overhead. Behind me are the Middle and Lower slots, full of their own beauty and ready to be explored. Photo © copyright by Rob Greebon.