With digital terrain models from HiRISE (High Resolution Imaging Science Experiment) GeoBoxers created a piece of the Hale Crater in Minecraft. The Hale Crater is one of the places where NASA found evidence that liquid water flows on Mars.
If you want to explore the crater by yourself, you can download the Minecraft map and install it, following the instructions given here.
In the Minecraft version of the Hale Crater height is scaled by 0.55, horizontally the scale is 1:1.
Visit Mars from the International Space Station
Another way to visit the Hale Crater is via IRISSCraft.