Seongsan Ilchulbong Tuff Cone
Korea’s crown jewel UNESCO World Natural Heritage site; a massive 182m hydrovolcanic tuff cone rising like an emerald fortress from the ocean.
Hours & Closures
Tickets & Admission
Contact & Website
Transit Access
🚗 Very large free public parking lot at the trailhead entrance.
History & Heritage
Formed 5,000 years ago by violent hydrovolcanic eruptions beneath a shallow seabed, Seongsan Ilchulbong rises 182 meters with a dramatic bowl-shaped crater ringed by 99 jagged basalt spires. At its base, traditional Haenyeo women free-divers demonstrate centuries-old sustainable harvesting.
Geologists worldwide consider it the textbook example of a Surtseyan tuff cone, where rising magma interacted violently with seawater to build cohesive ash layers resistant to ocean erosion.
Originally an isolated offshore island, it gradually joined the Jeju mainland through wave-driven sand deposition forming a natural coastal tombolo.
⏳ Historical Milestones
What to See & Highlights
Summit Crater Basin & Panoramic Viewpoint
성산일출봉 정상Wooden observation platforms looking directly down into the 600m-wide grassy crater bowl and panoramic ocean expanse.
Jeju Haenyeo Diver Performances
해녀 물질 공연Free daily seaside demonstrations (13:30 & 15:00) of traditional free-diving harvesting by UNESCO-recognized Haenyeo women.
Photo & Heritage Gallery
Visit Planning & Advice
1.5 to 2 hours
Dawn sunrise or early morning before tour bus crowds arrive.
- Two trails exist: the Paid Summit Trail (5,000 KRW, ~20-min stair climb), and the Free Coastal Trail leading to Haenyeo bay.
- Closed on the first Monday of every month for environmental preservation and trail maintenance.



