A staff member cleans in the deepest pool in the world with 45.5-metre (150-foot) located in Mszczonow about 50 km from Warsaw, November 21, 2020. The complex, named Deepspot, even includes a small wreck for scuba and free divers to explore.

It has 8,000 cubic metres of water -- more than 20 times the amount in an ordinary 25-metre pool.