This right eye of a stereo pair of views in a cylindrical-perspective projection was created from navigation camera images that NASA's Mars Exploration Rover Spirit acquired on sol 127 (May 12, 2004). Spirit is sitting at site 48. The tracks show the path the rover has traveled so far on its way to the base of the "Columbia Hills." In this image, the hills can be seen silhouetted against the horizon on the far left side. Spirit will reach the base of the hills by sol 160.
See PIA059023 for 3-D view and PIA05924 for left eye view of this right eye cylindrical-perspective projection.