Great Sandy Desert, Australia

The western region of Australia's Great Sandy Desert is in an area that has hardly any sand, but has complex land formations. Rivers appear blue as they snake across this scene dominated by colorful geology.

This image was taken on 2/24/2001.

Great Sandy Scars, Australia

In a small corner of the vast Great Sandy Desert in Western Australia, large sand dunes—the only sand in this desert of scrub and rock—appear as lines stretching from left to right. The light-colored fan shapes are scars from wildfires.

This image was taken on 8/22/2000.

Sulaiman Mountains, Pakistan

The Sulaiman Mountains are a major geological feature of Pakistan and one of the bordering ranges of the Indian subcontinent.

This image was taken on 4/28/2001.