“Double Arch” — also nicknamed the “Crescent Pool”, “Hole in the Roof” and, less poetically, the “Toilet Bowl” — was a ...

For millions of years, a natural stone arch stretched over a part of Rock Creek Bay in Glen Canyon National Recreation Area ...

Aerial image of Glen Canyon Dam, a concrete arch on the Colorado River. Water levels are at their lowest since the 710-foot-high dam filled to capacity in the early 1980s. Pete McBride The water ...