A drawing showing the depth of the Y40 Deep Joy, the worlds deepest pool. The design is harmonious with the surrounding countryside.

The Y-40 Deep Joy is the worlds deepest pool. Located in the Euganean Hills of Italy, it was designed by architect Emanuele Boaretto and is a part of the Millipini Hotel.

In addition to being the world's deepest pool, the Deep Joy is filled with thermal spa water which is heated to 32 degrees C.

The lobby outside of the Deep Joy. The pool was opened to the public for the first time on June 5, 2014.

The 40 meter (or 120ft) deep pool has an underground bridge at -5m for those who want to stay dry.

The Y-40 Deep Joy is the worlds deepest pool.

The outside of the Y40 Deep Joy, which is built into the hillsides of Italy.

The Y-40 Deep Joy features several levels and grottos.

The various levels and caves make it ideal of technical scuba diving, for which lessons are offered at the Terme Milleprini Hotel.