Arena Berlin Badeschiff

While I was living in Berlin last summer I went few times, swimming in a barge that has been converted into a pool.  It sits in the Spree River in the Kreuzberg district of the city.  By far the coolest pool I have ever been too.  Arena Berlin has a lot more then just the pool, there is a club (of course, where isn't there a club in Berlin) a grass park, art installations, a canal with resteraunts running along both sides and a lot more.  Visit there site the website and see more.  (Badeschiff is swimming pool in German)