Jeju National Museum

I have never failed to enjoy a museum in Korea. They are well-curated, the displays are informative and interesting, and most of them don't charge a fee for entry. There are free lockers for you to put you stuff so you don't have to lug them around and the staff at the information counter are most helpful. As this was in Jeju, the focus was on the history of the island, its people, and its culture. Combined with visits to the folk museum and a couple of other historical attractions, we had a good overall understanding of this delightful island. We had to skip the Hanyo museum and will save it for another visit. Facilities at this museum are excellent and there's a nice coffee shop on site.