If you spend enough time on the road you start to realize that stuff like this is really not that uncommon in the US. So much weird government shit that isn’t well marked or fenced, that you can just stumble into, or see on the horizon without a single road going to it.
In California I drove through a town on a weird back road southeast of Pinnacles National Park that was startlingly large and busy, it had what looked like cookie cutter chain restaurants, but only for chains I’d never heard of. It was like a main street full of people, but you could see beyond it there was nothing around the main street, just miles of desert, specked with the occasional oil pump or mobile home.
You see stuff like that in National Forests sometimes. Mostly it’s just mines or illegal grows, but sometimes there’s just like a huge palatial country home with 10 foot tall razor wire fences around it that isn’t on the map. Sometimes there is just a big group of people clearly unprepared to have hiked to such a remote place, wearing town clothes and smoking, and they all get really weird when they see you, and do not respond when you say hello. Sometimes you go to sleep and all night long you hear this distant whir like a positively massive generator is running, when you know that you’re 50 miles from the nearest atv road, and a hundred miles from the nearest spot of privately owned land, and in the middle of the night a helicopter flies that direction, and at dawn you watch a totally black helicopter fly back out from over the nearby hills. One time a group of folks I was camping with got buzzed so close by a fighter jet it knocked down all our tents, and left us all with our ears ringing. One time I camped just outside a military bombing range and spent all night listening to bombs detonating.