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Photo: Jmcc150, CC BY-SA 4.0 via Wikimedia Commons
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A geological feature of the Colorado River consisting of a grotto with high, vaulting walls and a deep central pool of water.
A small monument located about 50 miles uplake (about a two-hour boat ride) from the Glen Canyon Dam, set around the world's largest known natural bridge. The monument can be accessed from a wharf on the lake, followed by a short walk up the canyon.