Two years ago we visited an amazing industrial construction - abandoned military boiler room in Zielonka near Warsaw. It's a property of a Polish army. So... You probably think that the entrance was so dangerous. Well... No! 😂 It was one of the easiest places to explore. No fence, no security guides. For us, it was a nice place to take photos, but unfortunately it's a good place for scrap collectors. We've returned there this summer and most of the device was stolen. It made us sad. Abandoned places are beautiful, so take only pictures and leave only footprints.