<p>A 45.5-metre (150-foot) deep diving pool with artificial underwater caves and Mayan ruins, the world's deepest such structure, opened near Warsaw this weekend.</p>.<p>The complex, named Deepspot, even includes a small wreck for scuba and free divers to explore.</p>.<p>It has 8,000 cubic metres of water -- more than 20 times the amount in an ordinary 25-metre pool.</p>.<p>Unlike regular swimming pools, Deepspot can open despite coronavirus restrictions in Poland because it is a training centre that offers courses.</p>.<p>A hotel with rooms from which guests will be able to watch divers at a depth of five metres is also planned.</p>.<p>"It's the world's deepest pool," Deepspot director Michal Braszczynski, a 47-year-old diving enthusiast, told AFP at the opening on Saturday.</p>.<p>The current holder of the Guinness world record is in Montegrotto Terme in Italy and is 42 metres deep.</p>.<p>The Blue Abyss pool planned to open in Britain in 2021 will be 50 metres deep.</p>.<p>Around a dozen customers came on the first day, including eight seasoned divers who hoped to pass an exam to become instructors.</p>.<p>"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," said Przemyslaw Kacprzak, a 39-year-old diving instructor.</p>.<p>"And it's fun! It's like a kindergarten for divers!"</p>.<p>Jerzy Nowacki, a 30-year-old forestry officer and diving novice, said: "For my first time, we went down five metres but you can see all the way to the bottom -- the wreck, the caves -- it's magnificent!"</p>.<p>Braszczynski said the pool "will also be used by the fire brigade and the army. There are many scenarios for training and we can also test different equipment".</p>.<p>Some 5,000 cubic metres of concrete were used over the two years it took to build the pool and it cost around 40 million zloty </p>
<p>A 45.5-metre (150-foot) deep diving pool with artificial underwater caves and Mayan ruins, the world's deepest such structure, opened near Warsaw this weekend.</p>.<p>The complex, named Deepspot, even includes a small wreck for scuba and free divers to explore.</p>.<p>It has 8,000 cubic metres of water -- more than 20 times the amount in an ordinary 25-metre pool.</p>.<p>Unlike regular swimming pools, Deepspot can open despite coronavirus restrictions in Poland because it is a training centre that offers courses.</p>.<p>A hotel with rooms from which guests will be able to watch divers at a depth of five metres is also planned.</p>.<p>"It's the world's deepest pool," Deepspot director Michal Braszczynski, a 47-year-old diving enthusiast, told AFP at the opening on Saturday.</p>.<p>The current holder of the Guinness world record is in Montegrotto Terme in Italy and is 42 metres deep.</p>.<p>The Blue Abyss pool planned to open in Britain in 2021 will be 50 metres deep.</p>.<p>Around a dozen customers came on the first day, including eight seasoned divers who hoped to pass an exam to become instructors.</p>.<p>"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," said Przemyslaw Kacprzak, a 39-year-old diving instructor.</p>.<p>"And it's fun! It's like a kindergarten for divers!"</p>.<p>Jerzy Nowacki, a 30-year-old forestry officer and diving novice, said: "For my first time, we went down five metres but you can see all the way to the bottom -- the wreck, the caves -- it's magnificent!"</p>.<p>Braszczynski said the pool "will also be used by the fire brigade and the army. There are many scenarios for training and we can also test different equipment".</p>.<p>Some 5,000 cubic metres of concrete were used over the two years it took to build the pool and it cost around 40 million zloty </p>