Ch'ŏlli changsŏng
The Ch'ŏlli changsŏng (Korean: 천리장성; Hanja: 千里長城) or Great Wall of Korea may refer to either of two massive fortifications built between medieval Korea and the Chinese to the west and other tribes to the north. The first is a 7th-century network of military garrisons built by Goguryeo, one of the Three Kingdoms of Korea.