The Rim of Bopulu Crater - Sol 2179 (Approximate True Colors; credits: NASA/JPL-Caltech/Cornell Univ. - Addit. color process.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA:"NASA's Mars Exploration Rover used its PanCam to record this view of the Rim of a crater about 65 Km (approx. 40 miles) in the distance, on the South-Western horizon. This Crater, Bopolu, is about 19 Km (approx. 12 miles) in diameter.

The image was taken during the 2179th Martian Day, or Sol, of Opportunity's Mission on Mars (March 11, 2010), two days after the Rover drove Southward away from Concepcion Crater, site of several weeks of investigation.
Opportunity's long-term destination is Endeavour Crater, to the South-East and closer than Bopolu. The intended route heads South before turning East, in order to bypass potentially hazardous Sand Ripples, larger than the ones visible in the foreground of this image.

This Approx. True-Color view combines three exposures taken through filters admitting wavelengths of 750 nanometers, 530 nanometers and 480 nanometers".