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Wonder
Samnyeon sanseong
  In short
Ruins of an enormous mountain fortress, built in 470 – 473 AD. Measured length of the walls is 1,680 – 1880 m and they were 13 – 20 m tall.
45.8%
GPS coordinates
36.4885 N 127.7423 E
Location, address
Asia, South Korea, North Chungcheong, to the east from Boeun, Eoam-ri
Fortresses and forts
Map of the site
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