I think I've mentioned this before.

NMSU professor attempting to preserve record of human space exploration

The article's not that long, but if you don't want to read the whole thing, here's a bit that clears up my earlier confusion about the attempt to make the moon a National Historic Landmark.

While artifacts left on the Moon remain under the ownership and jurisdiction of the nation that left them there, an international agreement stipulates that no nation can claim property rights over the Moon itself. Therefore, when the team attempted to register the base as a National Historic Landmark, in order to ensure some protection of the site, it was not supported. The site also qualifies as a United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage Site, but O’Leary said no country, including the U.S., has nominated it to the list.