Manjanggul Cave
outdoor
One of the world's longest lava tubes, stretching over 7 kilometers with about 1 km open to the public. Home to a 7.6-meter lava column — the tallest known in the world. Cool year-round at 11-21°C. UNESCO World Natural Heritage site.
Address: 182 Manjanggul-gil, Gujwa-eup, Jeju City
Location: Gujwa, Jeju