From Halopedia, the Halo wiki
- Mare Crisium is a real location on the moon located on the near side facing Earth. It's a large "sea" much like the famous landing site of the Apollo 11 mission, very flat and over 500 kilometers wide it would be a good location for a lunar colony. Its location can be seen in this image.
 List of appearances
- Halo 3: ODST (Mentioned only)