JejuGujwa-eup
Manjanggul Cave
One of the world's longest lava tunnels (7.4km total, 1km open). A subterranean wonder with year-round 9–11°C temperatures, featuring the world's tallest lava stalactite (7.6m).
Tips
- ·Adult admission ₩4,000, open 09:00–18:00 (last entry 17:10), closed 1st Wednesday of month
- ·Year-round 9–11°C — bring a cardigan even in summer (cave chill is intense)
- ·1km open section takes 30–40 minutes to walk through