Abandoned amusement park in Berlin, Germany.
Being closed since 2002, but well protected due to german laws (Your property, your guilt, no matter if a dumb guy falls in a manhole during an illegal visit - if you don't secure your ground, you are responsible for everything that happens there!).
During some lawsuit between the old and new ownsers, there were no security for a whole week. So I took my chance and spent a visit there.

https://www.flickr.com/photos/atomh.....57624730468034