There was a ludicrous claim that there’s an alien ruin (or maybe it’s still occupied) on the Moon, and that somehow that fiction is related to the loss of the Clementine probe. I remember reading about it on a leftover copy after finishing my paper route on Mars. ;^)
https://freerepublic.com/focus/bloggers/1607979/posts?page=15#15
Not “an alien” instillation, but hundreds on both sides of the moon.
Besides there is nothing to say the putative installations are not a human or at least a previous Earth civilization we no nothing about.
More over there are many formations on the moon that have no geological explanation of their formation.