The pool is 45m deep, and is based in the town of Msxczonow, which sits around 40km southwest of the Polish capital.
It is filled with 8,000 cubic metres of water, which is equivalent to more than two dozen Olympic-size swimming pools.
The pool – called Deepspot – caters for scuba divers and freedivers, including those taking the plunge for the first time.
For those who do not dive, there is a transparent tunnel where they can enjoy the pool without getting wet.
At 45m, the Deepspot pool is deeper than the current Guiness World Record holder for the deepest swimming pool for diving in the world.
The Y-40 diving pool in Montegrotto Terme in Italy – which has a depth of 42m – won the title when it opened in 2014.
On Deepspot’s opening day, its director Michal Braszczynski told AFP: “It’s the deepest pool in the world.”
Przemyslaw Kacprzak, a diving instructor, told AFP: “There are no magnificent fish or coral reefs here so it is no substitute for the sea but it is definitely a good place to learn and to train in order to dive safely in open water.”
“It's like a kindergarten for divers,” the 39-year-old added.
Meanwhile, there is a project for an even deeper pool in the UK at 50m called Blue Abyss, which could open in around two years’ time, its chief executive told The Independent.
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