Seongsan Ilchulbong rises from Jeju’s eastern coast
Published on 09/24/2026 at 10:15 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Seongsan Ilchulbong rises from Jeju’s eastern coast as a volcanic tuff cone, with a broad summit crater above the sea. The mountain reaches about 182 metres (597 ft), and its slopes combine dark volcanic rock, grassland and steep coastal faces. Its distinctive form comes from an underwater eruption about 5,000 years ago.
Seongsan Ilchulbong: a crater above the ocean
The cone belongs to Jeju’s volcanic landscape, but its construction differs from the island’s many basaltic oreums. Water and erupting magma interacted beneath the sea, producing layers of volcanic ash and fragmented rock that accumulated around the eruption point. The resulting tuff cone rises sharply from the coastline.
At the summit, a large crater spreads across the upper ground. It measures about 600 metres (1,969 ft) across and reaches roughly 90 metres (295 ft) in depth. The crater floor carries grass and silver grass, while the rim forms a broken crown around the hollow. The summit crater’s dimensions give the mountain its most recognisable internal space.
From underwater eruption to protected landscape
The eruption belongs to the geological history of Jeju, an island shaped by repeated volcanic activity. Seongsan Ilchulbong was once separate from the main island, before sand and soil connected it to Jeju. The coast preserves the meeting point between the cone and the surrounding sea.
South Korea designated Seongsan Ilchulbong a Natural Monument on 19 July 2000. UNESCO added it to the World Natural Heritage List on 2 July 2007, recognising its volcanic landform and geological value. Jeju Island later became a UNESCO Global Geopark, with the peak among its principal geological features. The heritage designations of Seongsan place the cone within both Korean and international systems of landscape protection.
Human history is also visible along the coastal cliffs. In 1943, the Japanese army excavated cave fortifications in the rock and stored military supplies there. These openings belong to the wartime history of Jeju and sit within a landscape formed thousands of years earlier.
The summit path and the view towards Udo
The route towards the summit climbs the outer slope before reaching the crater rim. Stairs and paved sections cross the volcanic ground, while the upper path follows the edge of the cone. The terrain is exposed, with the coast visible below the rim.
From the upper ground, the view extends across the eastern part of Jeju and towards Udo Island. The crater occupies the inland side of the summit, while the ocean surrounds the outer cliffs. Sunrise gave the peak its English name, Sunrise Peak, and the eastern position places the sea directly beyond the coastal edge.
The summit landscape contains more than a single viewpoint. The crater, rim, grassland, cliffs and offshore water form separate parts of the same volcanic landform. The UNESCO geopark description records the cone’s height as 182 metres above sea level and identifies its east-facing position.
Visiting Seongsan Ilchulbong: what travellers from Western Europe should know
- Seongsan Ilchulbong is on Jeju’s eastern coast, in Seongsan-eup, within Seogwipo. Local buses serve the area, and the site is connected with Jeju’s road network.
- The summit route includes stairs and an exposed uphill section. The crater rim stands above the coast, with uneven volcanic ground beyond the paved parts.
- The official language is Korean and the 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.
Searching for Seongsan Ilchulbong on social platforms
These links open searches for Seongsan Ilchulbong on each platform.Frequently asked questions about Seongsan Ilchulbong
Where is Seongsan Ilchulbong?
Seongsan Ilchulbong is on Jeju’s eastern coast, within Seogwipo and near Seongsan-eup. Udo Island lies offshore beyond the eastern side of the peak.
What does a visit involve?
The route follows a rising path with stairs towards the summit crater. The upper ground includes the crater rim, grassland, volcanic rock and coastal views.
What makes the peak distinctive?
Seongsan Ilchulbong is an underwater volcanic tuff cone formed about 5,000 years ago. Its summit crater, coastal cliffs and UNESCO World Natural Heritage status define the site.
