Seongsan Ilchulbong, which is 180m above sea level, erupted underwater in the ocean about 5,000 years ago. This makes it a very rare case among the many craters in Jeju Island. It was designated a Natural Monument on July 19, 2000 and subsequently recognized for its outstanding geological value by UNESCO on July 2, 2007, when it was added to the World Natural Heritage List. The peak was also named a Global Geopark Network site in October, 2010.
Seopjikoji, which is located on the east coast of Jeju Special Self-Governing Province, is a beautiful coastline filled with canola flowers during the spring, Seongsan Ilchulbong Peak rising up in the background, and the stunning Sinyang Beach nearby.
Gwangchigi Beach is the end point of Jeju Olle Trail Route 1 and the starting point of Route 2. It is characterized by geological formations created when boiling lava met the sea and quickly solidified. Especially during low tide, hidden scenic spots that were covered by seawater emerge, revealing breathtaking hidden views.