Took a tour the other day of a temporary contemporary art space in Berlin. A former bank building which will be torn down in 3 months has been given over to 100+ street artists, from the hallways to the rooms to the bathrooms, cellar to roof.
One unusual thing is that no photos are allowed; visitors are required to hand in their cameras and/or phones upon entering. You can visit on your own, but have to stand in line; we took a guided tour of 2 hours, given by one of the artists. The variety of concepts was staggering, especially if you are (like me) not so knowledgeable about the street art scene. I hope the videos give an impression of the place: