제주도(jeju) 만장굴(manjanggul) 3
제주도에서 찍은 만장굴 사진^^
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#cave#phenomenon#manjanggul#coastal_and_oceanic_landforms#fluvial_landforms_of_streams#sea_cave#caving#karst_landforms#geological_phenomenon#formation#Jeju#underground_lake
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