Gapado Island

It is the fourth largest of Jeju's islands and looks like a stingray. There are several theories about the island's name, including the possibility that it was named after its resemblance to a stingray and was previously known as 'Gaedo' because it resembled a cover. You can see ruins like shell mounds, menhirs, and dolmens, and because the island is mostly flat and has no steep hills, you can walk around it in 1-2 hours. Every year in early April, the Gapado Green Barley Field hosts the 'Gapado Green Barley Festival,' which includes a variety of activities such as walking through the green barley field and building stone towers, so plan your visit accordingly.