This image from the Mars Orbiter Camera on NASA's Mars Global Surveyor highlights the Mars Exploration Rover Opportunity's approach toward "Victoria Crater."

North is to the left. Opportunity's location at sol 804 (April 29, 2006) is marked, as are the left and right edges of Victoria's rim from the rover's point of view. The labeled "promontory" is a bright spot that scientists believe is an outcrop on the far side of the crater. Marked in light purple is a small, 35-meter (115-foot) crater.

Victoria Crater is 750 meters (nearly half a mile) in diameter, about six times wider than "Endurance Crater," where Opportunity spent several months in 2004 examining rock layers affected by ancient water.

This image is an uncalibrated version that the rover team uses for planning. It has been reprojected and stretched in some places and isn't used for scientific purposes.