The crater is about 10 km (6 miles) across, and is a candidate location for ice frozen under the surface. Scientists have recently discovered that the Moon has quite a bit of water ice trapped under the surface dust, and places like Erlanger -- which never see the warming rays of the Sun, even after billions of years -- may have huge reservoirs of water eternally frozen at their bottoms. This would make Erlanger a good place to have a lunar base: water is abundant, and solar cells along the rim would deliver power 24 hours a day -- sorry, I mean 655 hours a lunar day.
Related post: Lunar Boreal Halo
Credit: NASA/GSFC/Arizona State University