The complex, named Deepspot, includes a diving pool with artificial underwater caves and Mayan ruins - and even a small wreck for scuba and free divers to explore.
Unlike regular swimming pools, Deepspot can open despite corona-virus restrictions in Poland because it qualifies as a training centre because it offers courses.
Deepspot is located in Mszczonow, a town in central Poland, about 40 kilometers away from the Polish capital Warsaw. Construction began in mid-2018.