Zelkova Trees of Mt. Dunji have witnessed the entire history of Yongsan from the Joseon Dynasty until the modern era. It is why they are also dubbed as the ‘Tree of History.’ The name, ‘Dunji Mountain,’ originated as military troops defending the Han River once set a base (‘dun’in Korean) here at the time of the Joseon Dynasty, and the troops also had “dunjeon (a farm cultivated by stationary troops)”while stationing at this location. And at the foot of this mountain, there was the Korean village of Dunjimi. It was known that Japanese troops were stationed here during the Japanese invasions of Korea between 1592 and 1598; and as if for evidence, some of the stoneworks used to construct a stronghold still remain at the site. Also during the Imo Military Revolt at 1882, Admiral Wu Chagqing and his troops of the Qing Dynasty stationed nearby and abducted Daewongun-the father of Korean’s King Gojong.