Descend into Manjanggul — one of the world's longest and most spectacular lava tubes, stretching 13 km beneath Jeju, and a UNESCO World Natural Heritage site. Walking its cathedral-like chambers, past lava stalactites and a 7.6-metre lava column, is primordially awe-inspiring.
What to expect
A 1 km section of the tube is open to visitors, and the scale is extraordinary — ceilings soar to 30 metres, the walls ripple with ancient lava flow marks, and the temperature drops to a refreshing 11°C year-round. Your guide points out the rare lava formations — bridges, shelves, and the iconic lava column at the far end, the world's largest. The dim lighting and cathedral silence make this an almost sacred experience. Combine with nearby Seongsan on the East Course for a full-day UNESCO double.
Good to know
Manjanggul is in Gimnyeong-ri, northeast Jeju, ~50 minutes from port. Wear a light jacket (cave is 11°C regardless of season) and flat shoes — the cave floor is uneven. Entry to Manjanggul is KRW 4,000 (~USD 3) independently; included in the Core Travel East Course tour price. Book the tour in advance.
Sail there
Luxury cruises that call at Jeju Island South Korea — book through us, the fare is identical and your concierge stays on your side.
More to do in Jeju Island South Korea
- Seongsan Ilchulbong: Sunrise Peak Crater Rim Trek
- Hallasan National Park: Crater-Lake Summit Hike (Seongpanak Trail)
- Jeju Haenyeo Experience: Diving with the Sea Women of UNESCO
- Daepo Jusangjeolli Cliffs & Jeongbang Waterfall: Jeju's Wild Coast
- O'Sulloc Tea Museum & Osulloc Farm: Jeju's Green Tea Ritual