World's Strangest Places
Courtesy of <a class="external" rel="nofollow" href="http://www.flickr.com/photos/gsfc/4404055899/">NASA/GSFC/Landsat 7/USGS</a>
Eye of the Sahara, Mauritania
level it’s difficult to make out the shape radiating from where you stand. This
30-mile-wide series of concentric rings in the town of Ouadane calls to
mind crop circles. But it wasn’t etched by aliens or fashioned by pranksters
with too much time on their hands. The upwelling of sedimentary rock has
naturally eroded to create what appears to be a rippled pond frozen in the
moment after a pebble has disturbed its surface.
Stay Safe: Bad roads and banditry mean overland
travel in Mauritania is neither easy nor advisable. For the best perspective,
hop a charter flight from nearby Morocco—the Eye of the Sahara is clearly
visible from space.