Sand Dunes of Badain Jaran Desert, China40.1N 101.9E
The large brownish expanse in the center of this image is the Badain Jaran Desert, in China. The desert spreads across the provinces of Gansu, Ningxia and Inner Mongolia, covering an area of 49,000 sq. kilometers (19,000 sq. miles).
The Badain Jaran is famous for being the location of the tallest stationary dunes in the world. Some of the dunes reach a height of 500 meters (1,600 ft.). They can be observed as largest ripples upon opening the full version of the image.