Old fort showcases castle-building techniques of Koguryo
In Sonnae-dong, Mangyongdae District of Pyongyang, there is Sosan Fort showing the high castle building techniques of Koguryo
Pyongyang Times January 26, 2021
In Sonnae-dong, Mangyongdae District of Pyongyang, there is Sosan Fort showing the high castle building techniques of Koguryo