National Park News on Instagram: "A famous arch in Glen Canyon National Recreation Area has collapsed into the water. The geologic formation in southern Utah was known by many names, including “Double Arch,” “Toilet Bowl,” “Crescent Pool” and “Hole in the Roof.” The scenic location was popular with visitors. Fortunately, no one was hurt when it collapsed on August 8. “Changing water levels and erosion from wave action is suspected of contributing to the ultimate collapse of the arch,” said the N