This may be the most valuable stuff ever gotten in the most dangerous place

I got two lights from an old abandoned elevator shaft prob rebar and concrete cap and the main building with the rails that had the lights was falling apart there was a crack in the structure like to half way in it and i think that just the porcelain fro the metal and the brass screws were the most valuable, so far I got one porcelain item out of one of the hard hat protection lights that were on the old cap and I don't know if it was a coal mine because I found coal in the area and it is close to big high line poles like maybe 300 yards away from them and for it to have a cap it may be dangerous, I won't go back, it wasn't posted property and I figure that no one would care about me getting them off the cap if I came back with them without falling in, I believe that there is a drain out pond close to it it has a small dam, this is what I got, it can hold a new light bulb. What was walking on there was concrete