Many of these images come from NASA's "Earth as Art" contest. Out of 120 beautiful Landsat images, people voted for their favorites; the five top ones are included in this gallery.

Lake Eyre sits in the northern desert region of South Australia, a primarily arid state. Although one of the world's largest internally draining systems empties into the lake, Eyre fills up completely only a few times every hundred years. When full, it's the largest lake in Australia. But when the water levels are low, as in this image, it looks more like a creepy face foaming at the mouth.