GREG DIMIJIAN / SCIENCE PHOTO LIBRARY GREG DIMIJIAN / SCIENCE PHOTO LIBRARY
Horseshoe Bend of the Colorado River in Glen Canyon, Arizona, at sunrise. Fisheye lens view from Navajo sandstone cliffs 1000 feet above, with sun lighting tops of cliffs. The river makes a 270-degree bend in an entrenched meander, flowing from right to left in the image. November 2, 2011.
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