Seongwi

Sŏgwi lies on the southern coast of the volcanic island of Cheju, beneath the slopes of Mount Halla. The coast was guarded against raids by a series of forts. In 1439 the governor Han Sŭngsun built defences for the local guard post; in 1590 Governor Yi Ok moved the fortress to a site east of the old harbour. Sŏgwijin served as a military and administrative centre for the island's southern shore.