Jeju Island (제주도) can be reached by ferry (round trip costs approx. 5.500 krw). You can spend a whole day on the island, for example, enjoying the view of the highest point of the island - the Halla-san volcano - and even climb it. If you prefer to sit in a local restaurant, cafe or walk around the island, it's up to you. You can stay for several days and stay in a hotel or with locals.
What to see around
Discover all the places to see in South Korea.