Ganymede

Ganymede
Jupiter’s moon Ganymede with a geologic map superimposed over a color mosaic, assembled from imagery collected by NASA’s Voyager 1, Voyager 2, and Galileo space probes.
 
References:
http://www.jpl.nasa.gov/spaceimages/details.php?id=pia17902
http://en.wikipedia.org/wiki/Ganymede_(moon)