Jeju Island, also known as Jeju-do, is South Korea's largest island, located southwest of the Korean Peninsula. This volcanic island is known for its stunning natural beauty, including its iconic Hallasan, the tallest mountain in South Korea and a dormant volcano, which is ringed by hiking trails. Jeju is famous for its unique geological features such as the lava tubes of Manjanggul Cave, one of the longest in the world, and the picturesque Jeongbang Waterfall that falls directly into the ocean. The island also boasts beautiful beaches such as Hyeopjae and Hamdeok, renowned for their fine sand and clear waters. With its subtropical climate, Jeju offers a diversity of outdoor activities, from relaxing beach vacations and water sports to exploring subtropical forests and witnessing fields of yellow rapeseed flowers in spring. Jeju's culture is distinct from mainland Korea, with its own dialect, customs, and cuisine. The island is also noted for the Haenyeo, female divers who harvest seafood by hand from the ocean, a tradition recognized by UNESCO. Jeju is a popular honeymoon destination and is well-equipped for tourists, featuring a variety of resorts, theme parks, museums, and markets.