Introducing Eastern Jeju-do

East of Jeju-si and 2.5 km off the coast, Majanggul in eastern Jejudo is worth visiting, if only to see the world's largest system of lava tube caves.

On the eastern tip of Jejudo, Seongsan Ilchulbong includes Seongsan-ri, or Fortress Mountain Village, at the foot of now extinct volcano Ilchubong.

Northeast of Seongsan is Udo Island which maintains its small town atmosphere in the face of a bustling tourist industry.