Been there. (the big rock). There was a room carved under the rock. Room had re-enforced concrete walls. One can still see where the stairs went down. Room was blasted by the feds when they discovered he had a very great interest in things happening at nearby Edwards AFB and China Lake (Navel research base). With a bright light one can see the concrete and bits of electronic equipment under the rock in the rubble. Local story is that he was a spy. All the weird stuff was cover.

Nomad