Grand Canyon: Top Photos

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

Before and after photos showing the recently constructed retaining wall along the top switchback of the Bright Angel Trail. Left photo from April, 2011, and right photo from May, 2013. This renovatio
Before and after photos showing the recently constructed retaining wall along the top switchback of the Bright Angel Trail. Left photo from April, 2011, and right photo from May, 2013. This… © Grand Canyon National Park, Public domain, via Wikimedia Commons

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