Jeju Island is part of South Korea, and its central volcano, Hallasan, is the country’s highest mountain at 1,947 metres.
Jeju lies south of the Korean Peninsula in the Korea Strait. It was formed by volcanic activity and contains lava tubes, craters, waterfalls, and distinctive basalt landscapes. Hallasan rises near the island’s center and is a shield volcano within Hallasan National Park.
The island has a distinct cultural history and was historically known as Tamna. Jeju’s traditional stone walls, sea-diving communities, and local myths contribute to its separate regional identity. Tourism is now a major part of the island’s economy.
Jeju is sometimes confused with Jeju Province as an administrative term. The province includes Jeju Island and nearby smaller islands, while the island itself is the large volcanic landmass most visitors mean when they say Jeju.