The name, “Horogoru,” originated from “Horoha,” which was the what Imjingang River area was called since the period of the Three Kingdoms. Horogoru Fortress Site was a military strategic point built by Goguryeo to fight against the foreign invasion. But after Gorugyeo collapsed and Silla took over the area, much of it was damaged but repaired during Silla period in its own way. Then, due to the outbreak of the Korean War, a part of the fortress walls was exposed, even the original walls built by Goguryeo. A great number of artifacts were discovered from Horogoru Site, which led to the area being designated as the Historic Site No. 467 in January 2006.