When Glen Canyon dam was built and Lake Powell filled up it drowned and destroyed possibly the most beautiful canyon on earth. Due to recent drought the reservoir is at a very low level exposing features which have been under water for a long time. I took a boat trip with a group called The Glen Canyon Institute which proposes lowering the Lake Powell level and putting most of the water into Lake Mead. Lake Mead is a better storage facility because the rock is more solid. Over 300,000 acre feet of water is lost into the sandstone around Lake Powell every year. That is the amount Las vegas uses. This little water fall is called Cathedral in the Desert. it is now exposed part way. There's still another 25 feet of reservoir water below it. After this year's snow-pack in the Rockies melt, it will be covered by water again, lost to everyone. I was fortunate to get this glimpse of what was, until they built the dam.