Big Crater is actually a pretty small Martian crater to the southeast of the Mars Pathfinder's landing site. The crater is 1500 meters (4900 feet) in diameter, about the same size as Meteor Crater in Arizona. Superimposed on the central part of the rim of Big Crater is another small crater called Rimshot Crater. The distance to Rimshot Crater, and the nearest portion of Big Crater, is 2200 meters (7200 feet.) To the right of Big Crater, almost lost in the haze is the large mountain named Knob. This mountain is over 450 meters (1480 feet) tall and over 30 kilometers (19 miles) from the spacecraft. Another feature, Southeast Knob, can be seen as a triangular peak to the left of the flanks of Big Crater rim This knob is 21 kilometers (13 miles) southeast from the spacecraft.

The larger features visible in this scene, Big Crater, Far Knob and Southeas Knob, were identified in Viking Orbiter images taken over 20 years ago! The scene includes rocky ridges and swales, or 'hummocks' of flood debris that range from a few tens of meters away from the lander to the distance of South Twin Peak. The largest rock in the foreground, just left of center, is named Otter and is about 1.5 meters (4.9 feet) long and about 10 meters (33 feet) distant from the spacecraft.

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