Achasan

Achasan is a mountain that sits between the counties of Gwangjin-gu and Guri in South Korea. It has an elevation of {convert|287|m|ft|0|abbr=on}. As you walk down towards Mt. Achasan from the summit of Yongmasan, you will find the ruins of a small fort of the Goguryeo era (BC37~AD668) built at a strategic point overlooking the area of Jungnangcheo...
Found on http://en.wikipedia.org/wiki/Achasan
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