Jeju Island
Jeju Island is the largest island in South Korea
Columnar joint in Jungmun, Jeju.
Columnar joint refers to the shape of a polygonal column as lava cools and contracts.
Jeju Island is the largest island in South Korea
Columnar joint in Jungmun, Jeju.
Columnar joint refers to the shape of a polygonal column as lava cools and contracts.