Since 2006, NASA's HiRISE camera has been orbiting the Red Planet aboard the Mars Reconnaissance Orbiter, snapping photos of the planet's surface. In that time, it's also managed to photograph several of NASA's biggest Martian milestones as they happen. This is an image of one of those milestones.
Specifically, this is a photograph of the Curiosity rover and its tracks. Granted, we've had photographs of Curiosity's first tracks since August, but those were photographed by the rover itself. This photo, on the other hand, was captured from Mars orbit.