Very interesting pictures,
long long halls with doors that can be blocked, seems to be an old prison-building. The architectural style is very similar in all three halls, so maybe the same building complex. Nevertheless the first picture showes a red cross, sign of a hospital, maybe the hospital building in this prison complex?
So similar the interieur... the picture of outside irritates a little bit. Thoug there is a watchtower, but the roofs seem to be flat, I'm missing the Light- construction, which should rise above the roofs...
nature conquers back abandoned aeria...