NASA has recently mapped Titan, one of the moons of Saturn, with the help of the Cassini Spacecraft. Titan has been called one of the most Earth-like places in our solar system. Titan is 1,600 miles accross, larger than the planet Mercury. However since theatmosphere of Titan is so thick and cloudy, it has been hard to make a detailed map of the planet with ordinary cameras. That is why NASA used the Radar on the Cassini spacecraft to make a 3D topographical map of Titan.
Check out the entire story with pictures of Titan here: http://www.jpl.nasa.gov/news/news.php?release=2013-161&cid=release_2013-161