NASA's Curiosity rover landed on Mars on August 6, 2012. Its primary goals were to gather geological and environmental data from the planet. This photo was taken by a navigation camera located toward the back-left of the rover. It is, one can see a part of Curisoty's nuclear power supply. Beyond the rover itself, one can see the terrain found in Mars's Gale Crater.
Photo credit: NASA/JPL-Caltech via the U.S. Department of Energy.