This was the first science image of Mars taken by THEMIS, February 19, 2002. It shows an area in Acheron Fossae, north of the giant volcano Olympus Mons, where mesas and valleys lie bounded by geologic faults. The image shows an area 11 by 6 miles (19 by 9 kilometers); the smallest details visible in the original image are 59 feet (18 meters) wide. Credit: NASA/JPL-Caltech/Cornell/Arizona State University