These are, quite simply, the coolest planetary maps I've ever seen.
I didn't know that the United States Geological Survey even mapped planets in the first place. But indeed they do. The map above -- of the moon's dark side, with colors correlating to geological materials and phenomena -- is one of a series produced in partnership with NASA between 1971 and 1998.
(I'm not sure what happened in 1998, but I wouldn't be surprised if the designers were all stolen by Marimekko.)
What amazes me is the thought that these maps wouldn't have been possible a century ago. Not only because of the data limitations, but because maps reflect how we see and imagine. They are cultural as well as geographical artifacts. And these are amazing.
The moon's western hemisphere is below. Explore away. And if you're on a public or work computer that's set to a generic desktop background, download some and spread the wonder.
NASA/USGS Maps:
Moon, Mercury, Mars, Venus and the Jovian moons Io, Ganymede and Callisto. 
