The swimming pool, as the guides call it, is in a chamber all by itself. The totally transparent and absolutely still water does not reveal its depth but looks deceptively shallow. The smooth floor of the cave worn down by the water and the rubbing action of the coral rocks over time has an undulating formation and the light lends a magical quality to this chamber. At certain times of the year and in bad weather the caverns become filled with water and the entrance acts like a giant blowhole.