There's a small shack near Boulder CO just off Indian Road
a little south of highway 128 on what used to be the Rocky Flats Nuclear plant grounds. I forget what they called them, but they were for overnight and weather shelter for cowpokes and their mounts in what was then way out in the boonies. The hail on the virtually treeless plains can get pretty deadly for man and livestock.
Anyhow, a friend of mine was a fairly avid "detectorist" and mentioned once that he decided to cross the fence to the bomb trigger plant and scout around the shack with his metal detector.
He found a couple of old rifle shells and a tin cup and was about to leave when security showed up in a jeep. His thin excuse was that he didn't know it was a toppityy secretty area. They detained him for a while and they took his ID and got his car plate number and did radio stuff from the jeep and finally let him go.
My reaction to this story I kept to myself but included the unspoken words stupid and ass. At the time, there were signs all up and down the borders of the plant declaring dire consequences for trespassing.
So he got away with it for the sake of a couple of common old cartridge cases and a tin cup.
I drove by there a couple of times a few years ago to meet my Son2 and the shack was still there. I think I remember they used to call them "line shacks," but don't bet on that.
Terry, 230RN
REF (The plant. The aerial photos don't do it justice. It was on a HUGE tract of land. Large enough, I guess, to "dilute" the effects of an accidental critical mass.)
https://en.wikipedia.org/wiki/Rocky_Flats_Plant