Boeun Samnyeonsanseong Fortress

보은 삼년산성 · Chungbuk · Palaces & heritage

Samnyeongsanseong Fortress was built during the Silla dynasty. The sprawling stone walls stretch 1.7 kilometers in length with x_heights and x_widths of 13-20 and 8-10 meters respectively. The name of the fortress comes from the time it took to complete the construction, three years ("sam nyeon" in Korean). The fortress was the site of many battles between Silla and Baekje during the Three Kingdoms Period.

Getting there

From Korea Tourism Organization open data. Opening hours and admission can change — check the official page before you go.

On nearby while you're here

Events run on fixed dates — check these against your own trip. Trip Planner shows everything on for the days you are in Korea.

• Oct 16, 2026 – Oct 25, 2026Boeun Jujube Festival · 1.7 km away

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