In Brussels, Belgium, there is the center of the recreational diving in which it is the deepest in the world indoor swimming pool. The pool has a few benches at a depth of 5 and 10 meters for those who don’t want to delve too much, several artificial underwater caves and a round well in the depth of 34.5 meters.
All of this is a monstrous container filled with 2,500 cubic meters of filtered pure non-chlorinated freshwater. The temperature in the pool is always maintained in the region of 30 degrees, and in the walls of the pool there are windows so you can watch the other swimmers at different depths.
