Seongsan Ilchulbong
1 Seongsan-ri, Seongsan-eup, Seogwipo-si, Jeju Special Self-Governing Province, South Korea
Seongsan Ilchulbong is one of Jeju’s most recognisable landforms, rising sharply from the island’s eastern coast as a hydrovolcanic tuff cone formed in shallow seawater. The official Visit Jeju attraction page identifies it as a UNESCO World Natural Heritage site, Natural Monument No. 420 and part of Jeju Olle Trail Route 1, while also giving the exact address in Seongsan-eup. Those details matter because this is not just a scenic viewpoint used loosely in tourism copy: it is a specific, protected visitor site with a defined identity and a clear place within eastern Jeju. Its compact scale makes the geology unusually legible, with steep ash-built slopes and a crater rim that explains, at a glance, why Jeju’s volcanic story is so distinctive. It ranks just below Hallasan because the experience is shorter and more concentrated, but that is also part of its appeal. Official Jeju tourism material describes it as a public tourist site and gives practical visitor information including address, contact details and transport context, showing that it remains an active, promoted attraction. The site is easy to pair with the east coast, yet it is strong enough to justify a dedicated stop in its own right. For first-time visitors especially, Seongsan Ilchulbong offers one of Jeju’s clearest combinations of geological importance, coastal setting and straightforward access.