Library

This is a Bookshelf....an open bookshelf

It's placed on the Poppelsdorfer Allé and the idea is to pick a book and bring it back when you read it or put in another book instead. It's absolutely brilliant, and people use it. Sometimes people stop by in the middle of the night on the way back from a party and start reading. 

However the most impressive thing is, that it never gets vandalized. This is the first step towards a perfect society.