what is the world's largest underground lake
The discovery was made in 1986 and the cave â because of the humid air that rises from it â has come to be known as Dragonâs Breath Cave. In its belly lies the largest underground non-subglacial lake in the world. So large, in fact, that divers have only been able to chart its depths to 430 feet. The lake has very clear water. Shielded from the elements, there is little wave action to kick up sediment.