The old Nike Missile base at Montrose Harbor in Chicago has been open for years.
There’s lighting on Mt. Umunhum right now.
My friends and I used to climb all over one in the Philadelphia area before it was raised and built upon. Old military sites are pretty cool. I saw many when I was stationed in Germany.
The locals here worked hard to save this as a chunk of landmark architecture from the Cold War rather than returning the mountain top to its natural state. Of course the Air Force scraped off most of the mountain top long ago to build this, so it wouldn't have been very natural anyway.