Hotel Terme Millepini, a 100-room four-star hotel in Padua, Italy, is recognized for having the world’s deepest swimming pool, the Y-40, which put it in the Guinness World Records.
The swimming pool is built over thermal sources bringing after cooling down a water at 32-34 degrees Celsius.
Y-40, with its depth of 42mt, is officially awarded the “Deepest Swimming Pool for Diving” by the Guinness World Records.
Designed by architect Emanuele Boaretto, Y-40 “The Deep Joy” pool first opened on 5 June 2014. It’s 40 metres (131 ft) deep, making it the deepest pool in the world and contains 4,300 cubic metres (1,136,000 US gal) of thermal water kept at a temperature of 32–34 °C (90–93 °F).
Underwater caves, a suspended, transparent, underwater tunnel for guests to walk through are some of the striking features of the pool.