Photo by Pete McBride @pedromcbride // Aerial view of the abyss — Marble Canyon of the Grand Canyon National Park — a place where a 310-foot dam was once proposed but eventually turned down due to public outrage and the hard work of many. To see another view of this geological masterpiece, go to @pedromcbride. #chasingrivers #aerial #conservation #Coloradoriver @ecoflight @oars_rafting by natgeo

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