SimMars is a mod for SimCity 4 taking the game to Mars. It will bring new buildings, transportation systems, user-interface and music and will replace the Maxis SimCity 4 content as far as possible, giving you the feeling to play a colony on Mars. The mod is still at beta stage. Beta 3 was released in October 2010.
One of the regions that will be available to either download in a regions add-on pack or can be rendered on own accord using greyscale images that are included in Beta 3.
These regions have been rendered from real Mars height maps and represent existing geographical locations.