Grand Canyon: Top Photos

Two billion years of Earth's history cut open by a river

DON HIRCHBORN, WATCHTOWER CONTRACTOR, ON RIM W/ MARY COLTER. DESERT VIEW. CIRCA 1932. COLTER.
DON HIRCHBORN, WATCHTOWER CONTRACTOR, ON RIM W/ MARY COLTER. DESERT VIEW. CIRCA 1932. COLTER. © Grand Canyon National Park, CC BY 2.0, via Wikimedia Commons

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