Wikipedia
The Badeschiff (in English, "bathing ship") is a floating public swimming pool in Berlin, the capital city of Germany. Situated in the East Harbour section of the River Spree, the Badeschiff allows citizens to swim in a sanitary environment near the river. The Spree itself is far too polluted to permit safe swimming.
The Badeschiff opened in the summer of 2004 as an art project organized by the Stadtkunstprojekte (City Art Project Society) of Berlin. It was created by local artist, Susanne Lorenz, with Spanish architects AMP and Gil Wilk, to enliven city life along a long-neglected stretch of the Spree.
The pool was converted from the hull of a vessel measuring eight by thirty-two metres. It is open to the public daily from 8am to midnight. Disc jockeys commonly spin records outside the pool entrance where there is also a bar.
Security do not allow any beverages to be brought in. Bags may be searched for bottles; even empty bottles can be confiscated.