Susandonggul Lava Tube, Jeju

Susandonggul is a large lava tube about 4,520 m in total length, with well-developed micro-landforms and formations including lava pillars, a three-tiered structure, lava shelves, lava stalactites, lava bridges and branch passages. It also yields abundant xenoliths, including quartz xenocrysts and inclusions of various igneous rocks, that can help clarify the formation history of Jeju Island, giving it very great academic value. Susandonggul is currently designated a restricted-access area to protect its cave formations; entry for management or academic purposes requires the permission of the Administrator of the Korea Heritage Service.

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Where it is

Region

Seogwipo, Jeju

Designation

Natural Monument · 천연기념물