This Month in Photo of the Day: Photos From New National Geographic Books

It doesn’t take much to get rolling down a Namibian dune. These students on a geographical field trip find the slope irresistible but end up with sand in every nook and cranny.

(From the National Geographic book Visions of Earth)

Buy the book Visions of Earth »
See more pictures in our monthly Visions of Earth feature »
See more pictures of Namibia, shot by our readers »