http://www.zuzafun.com/floating-pool
This floating swimming pool that was spotted on the Spree river in Berlin, Germany, where temperatures have been unseasonably warm. It’s actually an old barge that’s been converted into a public swimming hole because the Spree is much too polluted to swim in, hence the need for a floating pool.

http://www.instatravel.org/entry/be-in-water-in-the-water-on-floating-swimming-pool/
How about swimming in a pool that floats? Yes, you have read it correctly, the floating swimming pool also known as Badeschiff (bathing ship), the brainchild of Ann Buttenwieser gives you the opportunity to be in water on water.

The floating pool is a 25 meter, seven-lane pool that can fit 174 people. The pool has cost more than $4 million to build. There are translucent murals that depict the history of marine life on the New York waterfront. The pool is open to the public from 11 am to 7 pm and seven days a week through Labor Day. A free shuttle bus carries the swimmers from the surrounding neighborhoods.

Temperature of Berlin soared to the peak of 32 degree Celsius on 15th of July, 2007 and many people were seen cooling down in a floating swimming pool on the Spree River. So, if you are the one looking to escape the heat in some different way, the floating pool is for you!