According to the Jeju Island Cave Research Institute (Director: Sohn In-seok), the lake is seven to 15 meters wide, six to 15 meters deep and 200 meters long, and is located approximately 2.3 kilometers north of the entrance of the cave. Given that the lake is 100 to 150 meters away from the seashore, it is estimated that sea water might have come in through the cave.
In: Speleonet
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