Poland

Poland's Deepspot will be scuba divers' new play arena Poland can now claim to own the world’s deepest swimming pool, Deepspot. The project took almost two years to get constructed. While it might not be an exact replica of the ocean, there are mock Mayan ruins installed underwater. The pool is intended to function as a training site for scuba divers.

Since it is an artificially constructed diving facility, it can serve as a diving pool throughout the year