Inside Y-40, the world's deepest swimming pool

Italy's Y-40 The Deep Joy is not for the faint-hearted. It's the world's deepest swimming pool and is located inside Hotel Millepini Terme in Montegrotto Terme, near Venice.

The pool reaches depths of 40 metres and temperatures of up to 34C. It has the diving height of a 12-storey building, with a variety of platforms that can be explored by free divers and scuba divers.

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Y-40 even has underwater caves and there is a transparent underwater tunnel so non-swimmers don't have to miss the experience.

Designed by renowned architect Emanuele Boaretto, the pool, which opened in 2014, contains 2,500,000 litres of non-chlorinated spring water.

Speaking to the Daily Mail, Boaretto said: "Y-40 is unique in its field thanks to the spa water, which cannot be outsourced."

Underwater photographer Rino Sgorbani, from Italy, plunged down to the depths of the pool and told The Sun: "In the shallower part it felt like a normal pool.

"The deepest part is like an immersion into the sea depth, but with water as hot as the Caribbean. It was a nice experience and it was exciting."

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