Might be a bit interesting for you urbex bods... me and my dad do WW2 reenactments, and got invited to stay with some German reenactors in an old great war era fortification in Mysen, Norway. It was used by the Germans as a field hospital during occupation and isn't generally open to the public so a lot of it was untouched since the second world war. There's still some wartime era boxes and furniture laying around. Underneath there are tunnels for miles so we were advised not to explore too far on our own.
Anyway, it's not really a ghost story but the whole place reeked of an uncomfortable air. Yes it gave you chills although it was winter in Norway.. there was a little talk of the place being haunted and so as you do a few of us lads went exploring the complex.. all sorts of giant cannons, pillboxes but as you got deeper there were creepy winding rooms and pits.. tens of meters underground we eventually found this metal door that opened into what was basically a cave, already ringing alarm bells we had a little venture in but didn't want to go too far off the beaten track (plus the place was dead scary. one of the rooms was apparently an old outhouse but the wood had all rotted and it looked like a scene out of silent hill). One of the lads got a bit spooked and wanted to head back. Arriving back the door we had previously opened to get in (and it's a big heavy door) was closed shut. We really struggled to get it back open without a group effort and the young one in the group swore he felt a presence.
We all rushed back to civilization lol.