Jeju-do
Jejudo has exotic views and fruits compared to other places in South Korea. A few things it is famous for are Jeonbokjuk (a kind of congee made of abalone) and Dekopon.  Hallasan, the highest mountain in South Korea, is at the center of Jeju-do. The Natural World Heritage Site Jeju Volcanic Island and Lava Tubes is also on the island.