Equal to the height of a 12 story building, this new enormous pool defies imagination at 137 Ft depths. Named ‘Y-40 The Deep Joy’, the pool is located in the Hotel Terme Millepini near Padua, Italy. This massive pool allows scuba divers to train in controlled conditions for deep water diving. There are numerous underwater viewing windows for spectators and instructors to keep an eye on students, along with a transparent tunnel 16 ft down. Imagine filling this pool with some deep water species to create a one of a king pool diving experience!