In the late eighties, I lived on North Riney Road across from the Knights of Columbus Hall. This twenty-acre property was a parking lot with a large metal building. What struck me as odd about this property was a small grass yard on the west side of the building fenced in by a single strand of wire about knee high. No one parked there, walked there or played there. It seemed to be off limits.
I was aware of the existence of Secret Underground Stuff at this time. I learned from 1958 and 1964 aerial photos that this odd patch of grass in front of the Knights of Columbus was a cover up for Underground Secret Stuff.