The Holden Crater

Explore Mars' Holden Crater here.
These are some of the most garish colors I've seen in a satellite image... it looks like Rainbow Brite vomited all over the place.
Actually the colors do have meaning:

     "In the image, areas with high abundances of
     rocks and hardened deposits show up in reddish
     tints, while areas covered with sand, loose dirt,
     and fine dust appear in blue colors. Areas with a
     mixture of these extremes display yellows and greens."