Seated on the west bank of Hunjiang River, north of Huanren County, Mt.Wunu is also named "Mt. Wulong". There was a legend that 5 ladies were stationing troops in the mountain. So the mountain got this name. The highest peak is 824m,and is 1500m long east-west,300 m long south-north . At the mountain top, there used to be an ancient temple. Now the lake there is still clear and never dries up. The lofty Mt.Wunu towers up in the air with rivers flowing around. On its east and south is the Hunjiang River, on its west the Hada River, and north the Dadonggou River. Standing on the Terrace of the General Muster Platform on the east peak and looking into distance, one may see the wide expanse of misty cloud, mountain, water merging into an organic whole.

In AD 37,the Koguryo Nationality built their city walls at the east slope of the mountain. Several sections of the 3 m-high stone walls are left. The Mt.Wunu City is the first capital city of Koguryo Nationality.

Established in 37 BC and destroyed in 668 AD, the Koguryo Kingdom lasted for 705 years and played a big role in the development of Northeast Asia.