Gaeju

Kaeju, later known as Kaech'ŏn, lies in the inland country of northwestern Korea. Its valleys belong to the Ch'ŏngch'ŏn River basin, between the western plains and the northern mountains. In Koryŏ times the district developed from the fortified post of Choyangjin, originally called Ansujin. The old fortress site preserves the memory of a frontier settlement that preceded the later town.