한라산 썸네일형 리스트형 하루하나 관통사준비 면접요령77~80)제주도 77. (제주도) 거문오름 용암동굴에 대해 설명합니다.According to UNESCO, the 거문오름 lava tube system is the finest, best-preserved system of lava tubes anywhere in the world. There are five tubes in the system; the longest of these, 만장굴cave, is over 13km long. These impressive tubes must be experienced to be believed-channels of black volcanic rock decorated by fantastical lava pillars and stalactites, the tunnels form.. 더보기 이전 1 다음