There is one place named Optongni in South Korea.
All places in the world called "Optongni".
Sinchon (14)
Naedong (13)
Sangchon (13)
Cholgol (12)
Yongdong (12)
Singi (12)
Changdong (12)
Taedong (12)
Songjong (12)
Pyongchon (12)
Yangchon (11)
Haktong (11)
Tongchon (11)
Saeto (11)
Chungni (11)
Hadong (11)
Chungdong (11)
Wolchon (11)
Chomchon (10)
Mokkol (10)
Naechon (10)
Saemal (10)
Kyodong (10)
Yongsan (10)
Yongam (10)
Songjongni (10)
Tokkol (10)
Sadong (10)
Chungsan (10)
Chungchon (10)