Jeju Folk Village Museum
Quite a small place, finish touring the place quite fast. Something different.
Jeju Stone Park
It actually explain to you the formation of volcanoes, the different rocks and also the unique looking rock. the one on top looks like a dinosaur.
Beside it is a small small art museum.
It is consider a bit boring to me unless you are into this kind of thing and hope to learn something. However, it is indoor so good place to visit if it is a rainy day.