Mars Index - Top Ten MER Images - Top Raw Images
21
Wheel tracks in the sand go around in circles before descending in a straight line toward the lower right edge of this image. In the background, toward the top of the image, is a rock-strewn surface that slopes upward from left to right.
Swirling in Spirit
Round and round it goes, where it finally ends up, nobody knows!

Image Credit: NASA/JPL/Cornell