Rock Formation (columnar structure) of Devils Tower viewed from the northwest, Devils Tower National Monument, 1947. National Park Service photograph by George A. Grant: Negative Number CO-WASO-957.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/42600860@N02">National Park Service</a>
2016-05-23 15:42
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nationalparkservice/27511218636/">HPC-001363</a>