CRATERS AND DEPRESSIONS open "windows" into the subsurface terrain of northwest Arabia Terra. In the bottoms of some depressions lie deposits that formed under different environmental conditions than Mars has at present. This view (which has no vertical exaggeration) looks toward the north-northeast. (A 330 kB version of the image is available.) Credit: NASA/JPL/Arizona State University, R. Luk.
To explore this area further, check out the THEMIS feature article.