Seongsan Ilchulbong and its open volcanic crater

Seongsan Ilchulbong rises from Jeju’s eastern coast as a volcanic cone with an open summit crater. Its steep profile, layered rock and coastal setting make the landform readable from the shore before the climb begins.

The crater measures about 600 metres across, while the cone reaches roughly 180 metres above sea level. At the summit, grass occupies the broad interior instead of a crater lake.

Seongsan Ilchulbong: a crater above the coast

Seongsan Ilchulbong is also known as Sunrise Peak. It lies in Seongsan-ri, on the eastern side of Jeju Island, within Seogwipo in Jeju Province, South Korea.

The landform is a tuff cone, a volcanic feature made from compacted ash and fragmented rock. Its visible layers include breccia, lapilli tuff, stratified tuff and bedded tuff. layered volcanic structure appears in cliffs cut by wave erosion.

From shallow seabed to UNESCO landscape

Seongsan Ilchulbong formed through a Surtseyan-type eruption in a shallow marine setting. Rising magma met seawater, producing fragmented volcanic material that accumulated into the cone.

The landform is connected to Jeju Island by coastal deposits. Its geological history belongs to the volcanic development of Jeju, an island shaped by basaltic eruptions and numerous secondary volcanic cones.

Seongsan Ilchulbong forms part of the UNESCO World Heritage property Jeju Volcanic Island and Lava Tubes, inscribed in 2007. The serial property also includes Hallasan Natural Reserve and the Geomunoreum Lava Tube System. UNESCO World Heritage setting connects the cone with Jeju’s wider volcanic landscape.

Rock layers, sea cliffs and the grassy summit

The outer slopes rise towards a rim surrounding the crater. The interior is covered by grassland, while the exposed sides reveal beds of volcanic sediment and broken rock.

Wave action has cut into parts of the cone and opened sections of its internal structure. These exposures show how layers were deposited during explosive interaction between magma and water.

The distinction between summit and shoreline remains clear across the landscape. A broad crater occupies the upper part, while the coast opens around the lower slopes. The result is a landform combining a high rim, an enclosed interior and sea-facing cliffs.

The summit is associated with views towards the surrounding sea and Udo Island. Sunrise is part of the site’s name and cultural identity, while the geological form remains the central feature.

Visiting Seongsan Ilchulbong: what travellers from Western Europe should know

• Seongsan Ilchulbong stands in Seongsan-ri on eastern Jeju. Local roads and public transport connect the site with Seogwipo and other parts of the island.
• The route rises from the coast towards a summit rim. The approach includes sustained uphill walking and stair sections.
• The summit terrain combines paved paths, steps, exposed volcanic rock and grassland around the crater.
• The official language is Korean and the national currency is the South Korean won.
• Entry requirements depend on your nationality; UK travellers can check the FCDO travel advice at gov.uk/foreign-travel-advice, Irish travellers the Department of Foreign Affairs at ireland.ie.

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Frequently asked questions about Seongsan Ilchulbong

Where is Seongsan Ilchulbong?

Seongsan Ilchulbong is on Jeju’s eastern coast, in Seongsan-ri within Seogwipo, South Korea.

What can visitors expect on the site?

The route climbs from the coastal area towards the summit rim, with steps, uphill sections and views across the crater and sea.

What makes Seongsan Ilchulbong distinctive?

Its broad crater, layered tuff, sea cliffs and grass-covered summit belong to a volcanic cone formed in a shallow marine setting.