The Sangre de Cristo Mountains of south-central Colorado stretch dramatically from top left to lower right of this astronaut photograph. The mountains are outlined by dark green forests at lower elevations and white, snow-capped peaks at the highest elevations. Dun-colored dunes are banked up on the west side of the mountains. These dunes make up the Great Sand Dunes National Park and Preserve.
This astronaut photograph shows classic large and small sand masses of the central Sahara Desert, where wind is a more powerful land-shaping agent than water.
White sand dunes spill across the Snake River Plain in a wide arc in this detailed, photo-like image acquired by the Advanced Land Imager on NASA’s EO-1 satellite on September 25, 2010.
Acquired October 22, 2008, this true-color image of Sequoia National Park shows a network of varied ecosystem, including conifer forests, river valleys, alpine vegetation, and bare rocks.