A 45.5-meter (150-foot) deep diving pool with artificial underwater caves and Mayan ruins opened near Warsaw. The complex, named Deepspot, is the world's deepest structure of this kind and even includes a small wreck for scuba and free divers to explore. It has 8,000 cubic meters of water – more than 20 times the amount in an ordinary 25-meter pool. The current holder of the Guinness world record is in Montegrotto Terme, Italy, which is 42 meters deep.