Looking into the backyard of a hotel in Berlin I catched a very special building. A beton shelter which had been build but never been finished in WW II. After the war the allied forces tried to blow it up. Calculating the mass of dynamite beeing needed stoped this plan. Cause the erruption would have been damaged the low number of buildings around the shelter which had survived the war. So the alternative had been to build a house like a bridge over the shelter. And this looks a little bit strange and unreal like the digital dublicated buildings in photos of Andreas Gursky.