The path of Opportunity (as seen from orbiting MGS)

Caption NASA originale:"The image was acquired on April 26, 2004, during Opportunity's 91st Sol. That was the first day of Opportunity's extended mission (...) The tracks made by Opportunity on the sandy surface of Meridiani Planum are not quite as visible from orbit as are the tracks made in Gusaev Crater by the other Mars Exploration Rover, Spirit. A dustier surface at the Spirit site increases contrast between the tracks and the surrounding surfaces. Indeed, some parts of the track made by Opportunity are not visible in this image".