It makes an Olympic swimming pool look like a puddle. As if Dubai wasn’t filled with enough record-breaking attractions, the United Arab Emirates metropolis is now home to the world’s deepest pool, ...

How low can you go? When the world’s deepest pool opens in Poland later this year, complete with underwater caves and overhangs, you’ll be able to go as low as 45 meters (148 feet). An ideal training ...

Known to some as the “Freshwater Everest,” if you want to explore this mountain, you don’t go up, you go down. In the middle of Lake Superior, near the boundary between Canadian and US waters, sits ...

In synchronized swimming, most of the action happens above the water. Spectators never get a chance to see what's going on beneath all the graceful lifts and kicks on the surface — until now. A series ...

I swallowed down desperate gulps of air from my snorkel. Pool water, too. My lungs burned. The water sloshed around me in waves, churning so much it looked like a boiling sea, the phenomenon natural ...