Jeju Island

Jeju Island is the only special autonomous province of South Korea, situated on and coterminous with the country's largest island. Jeju-do lies in the Korea Strait, southwest of Jeollanam-do Province, of which it was a part before it became a separate province in 1946. Its capital is the city of Jeju.

Jeju Island is a volcanic island, dominated by Halla-san (Halla Mountain): a volcano 1,950 metres high and the highest mountain in South Korea.

The island was created entirely from volcanic eruptions approximately 2 million years ago, during the time period from the Tertiary to the beginning of the Quaternary period, and consists chiefly of basalt and lava. The eruptions took place in the Cenozoic era. It has a humid subtropical climate, warmer than that of the rest of Korea, with four distinct seasons. Winters are cool and dry while summers are hot, humid, and sometimes rainy.