Mountains of Jeju Province

Hallasan () is a shield volcano comprising much of Jeju Island in South Korea. Its summit, at , is the highest point in the country. The area around the mountain is a designated national park, named Hallasan National Park. Hallasan is commonly considered to be one of the three main mountains of South Korea, along with Jirisan and Seoraksan.

South Korean protected area

Sanbangsan () is a volcano located on the southwest coast of Jeju Island, in , Seogwipo, South Korea. It is a trachytic lava dome that is tall.