<p>Photo: Sahara sand dunes</p>

The towering sandstone pinnacles of the Sahara were eroded by long-ago rain.

Photograph by George Steinmetz

Related Features

Chad Map

Enlarge Map »

Take a Nat Geo Trip

Select a destination or trip type to find a trip:

See All Trips »

Join Nat Geo Travel's Communities

2015 Traveler Photo Contest

  • Picture of a tree under night stars in Deadvlei, Namibia

    See the Winners

    Explore the top photos, share your favorites, and browse all entries.