The Mars rover Opportunity recently edged up on this crater called Fram. The rim has an exposed section of bedrock that's about 3 feet (1 meter) high.

Fram crater is about one-third of a mile (450 meters) from Eagle Crater, where Opportunity landed, spent its initial weeks and discovered evidence for past water.

Fram is about 820 feet (250 meters) from Endurance Crater, where Opportunity is headed. There the rover is expected to see bedrock shelves as tall as 30 feet (10 meters). Scientists hope the rocks will reveal a more detailed history of water in broad Meridiani Planum.

This cylindrical projection was constructed from a sequence of four images taken by the navigation camera onboard the rover. The images were acquired on sol 85 of Opportunity's mission. Back on Earth, that's April 20, 2004. Click here for a larger version of the image.

Credit: NASA/JPL