Sagan Memorial Station.

After landing on Mars on July 4, 1997, the Mars Pathfinder spacecraft underwent a name change. Responsible for bringing the robot rover, Sojourner, to the red planet, the now stationary Pathfinder would heretofore be called the Sagan Memorial Station. Serving as a hub for the one-foot-tall rover, Sagan Memorial Station can be seen in this photograph from Mars.

Check out this image for a glimpse of the little Sojourner at work.

Thanks to NASA's Astronomy Picture of the Day.