8The Shaft Sinkhole, Mount Gambier, Australia

This incredible dive site is full of cave diving. The shaft sinkhole might just be the most dangerous cave dive on the planet. At the beginning of this dive, the diver must take off their equipment in order to get through a manhole which is just too small to accommodate both them and their equipment.

Once their equipment is passed through to them, they can begin their dive through a series of extremely dark and dangerous caves. Low air consumption is essential for this dive as divers can get lost or simply do not save enough air for the journey back to the surface. Unfortunately, many divers have lost their lives due to this reason.

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