<p><br> The Colorado River winds through Nankoweap Canyon in Grand Canyon National Park, Arizona. North America's geologic history is writ large in the sandstone heights across the U.S. West.</p>

Nankoweap Canyon, Grand Canyon National Park


The Colorado River winds through Nankoweap Canyon in Grand Canyon National Park, Arizona. North America's geologic history is writ large in the sandstone heights across the U.S. West.

Photograph by Ralph Lee Hopkins

United States Photos

See photos of the United States (including national parks, the Grand Canyon, Times Square, and more) in this travel photo gallery from National Geographic.

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