i love old ww2 bunkers and stuff like this.
where i grew up in nottingham there was a rolls royce airfield near by and even though we werent suposed to and they had roaming security patrolling the perimeter we used to sneak in and explore.
we discovered that every hill on the airfield were artificial and inside each one was a mini ww2 bunker and some of them still had old ww2 radio gear , tables , chairs etc inside.
they must have set there for 40+ years without anyone ever going inside them open to the elements etc.
it wouldnt suprise me if everyone who worked at the airfield werent even aware they existed