Jeju Biyangdo Island

Biyangdo Island is located off the coast of Hallim in the west of Jeju. The center of the island is composed of an explosion crater. Explosion craters are formed in environments without water, so it is geologically interesting that there is an island made of an explosion crater in the middle of the sea. There are well-maintained walking trails along the coast of Biyangdo, and interesting geological phenomena are distributed close to the trails, making it a good place for observation.