Badeschiff! A great idea to swim in the middle of Berlin, in the river but yet in a clean pool. In a ship, or barge converted to a pool.
Much recommended. Pretty cold water though, even in the summer. There's also a great bar, overall a very nice place to hang out.
Read more from the Wikipedia article or the official website. The place is open year around, and in the winter there are saunas.
Photos (c) 2017 by Jari Arkko. All rights reserved. All pool photos have been taken when the facility is closed, with permission, not of other people, or with permission.