Manjanggul Cave (Jeju) FAQs In 2026 - 2027

Manjanggul Cave is a long lava tube system located in Jeju Island, South Korea. It is one of the finest lava tunnels in the world and has been designated as a Natural Monument by the Korean government. The cave features a variety of interesting structures created by flowing lava, including stalactites, stalagmites, and lava columns.

Manjanggul Cave was formed around 200,000 to 300,000 years ago during a volcanic eruption from Geomunoreum, one of Jeju Island's parasitic volcanoes. Molten lava flowed across the surface and solidified on the top first, forming a crust while the lava underneath continued to flow away, eventually leaving behind empty tubes or caves.

Yes, Manjanggul Cave is open to tourists. However, only a portion of the cave, approximately 1km, is accessible to visitors for conservation purposes. The cave's interior is well-maintained with pathways and lighting to guide tourists safely through the underground environment.