Tracks left by NASA's Mars Exploration Rover Opportunity as it traveled along the rim of Victoria Crater can be seen clearly in this image, taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter spacecraft. Opportunity first approached Victoria Crater at an alcove informally named "Duck Bay" (see tracks at left). It then drove along the crater's sinuous edge in a clockwise direction before heading back to Duck Bay, where it is expected to enter the crater in early July 2007.