Seongsan Ilchulbong is a rock island that stands above the waves like a fortress, from which its name “fortress mountain” originates. It is one of the 10 Jeju sights and a mainstay in the must-visit sites in Jeju tourism. It is also a part of Jeju Olle Trail Route 1. Seongsan Ilchulbong is a tuff cone formed by the magma erupting below the sea. Standing 180 m tall above sea level, only the crater of the rock remains, and the rest were eroded by the waves. As such, its sedimentary layers are exposed as a cross-section on its surface, giving the rock a considerable academic value in geological studies of hydrovolcanic formations. Its value was recognized through its designation as a UNESCO World Heritage Natural Site in 2007 and a Global Geopark in 2010. It takes about 20–30 min to reach the summit from the ticketing booth, and there are wooden steps to sit on near the top. The view from the top covers the eastern sea of Jeju, the Seongsan-eup area, and Udo Island.
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August 26,2019
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