What is "jejudo"

Jejudo (also known as Jeju Island) is the largest island off the coast of the Korean Peninsula, and the main island of Jeju Province of South Korea. The island lies in the Korea Strait, southwest of South Jeolla Province. The island contains the natural World Heritage Site Jeju Volcanic Island and Lava Tubes. Jejudo has a temperate climate; even in winter, the temperature rarely falls below .