Ice Diving. Antarctica
Scuba diving is already one of the most dangerous recreational activities in the worldbut ice diving takes that risk to a whole new level. While standard diving already puts the participant at risk of drowning, barotrauma (increased underwater pressure), decompression sickness and nitrogen narcosis, ice diving also adds the dangers of a single entry/exit point. As the ice is usually very thick, a small hole is cut at the surface for the divers to enter and a rope is also attached to their harness for extra safety. While this helps to reduce the risk of ice diving, the incredibly low water temperatures and a ceiling of ice with only a tiny exit point makes ice diving one of the most dangerous swims in the world.
