In Brussels, there is Nemo 33 – the deepest indoor swimming pool in the world. It was created specifically for diving, and came up with his John Beernarts in 1996. But for the general public pool opened on May 1, 2004. Nemo 33 – this pool depth of 33 meters (hence the name). The pool contains 2.5 million liters of water! Opened in 2004 pool used for training divers to various studies, as well as for recreation. Temperature of the water is kept at around 30 degrees due to the large number of solar panels. The pool has two “reservoir” and three “holes”, the deepest of which is 6 feet in diameter and reaches a peak at 33 m pool.