Photo of the Day

Aerial view of sand
October 7, 2010

Lencois Maranhenses National Park, Brazil

This Month in Photo of the Day: National Geographic Magazine Features

Waves of sand, firmed by an overnight rain, flow along the route of a fisherman pedaling his catch at dawn to trade it for supplies. When the dune dries in a day or so, the wind will begin to reshape it once again.

See more photos from the July 2010 story "A Sea of Dunes."

See photos of U.S. National Parks »

Photograph by George Steinmetz, National Geographic

Go Further

Subscriber Exclusive Content

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history