Stunning White Salt Flats of the Salar de Uyuni, Bolivia – March 20th, 201320.1S 67.5W
The bright white area in the lower part of this image is the salt flats of the Salar de Uyuni, in Bolivia. Salt pans occur in areas which would otherwise be lakes or ponds if the climate did not evaporate the water quicker than the rate of rainfall. The result if the liquid can’t drain is massive deposits of minerals.
The Uyuni salt flats stretch 6,500 miles, making them the biggest in the world. They are even larger than Lake Titicaca, the vast stretch of water shared by Bolivia and neighbouring Peru (visible in the upper part of the image). They are also so flat that NASA uses their surface to calibrate satellite orbits.