Mudeungsan Mountain (1,187m) features three rocky peaks called Cheonwangbong Peak, Jiwangbong Peak, and Inwanbong Peak. It is the tallest mountain in Gwangju and the adjacent areas. The summit consists of Cheonwangbong, the highest peak, Jiwangbong Peak and Inwangbong Peak. The ridge formation stretches from the north-northwest to the south-southeast. The peaks consist of columnar jointed colonnades, composed of Cretaceous welded tuff. The face of the colonnades is 1.5 to 2 m wide and the diameter of the colonnades ranges from 3 to 4 m. The U-shaped valley to the north of Cheonwangbong Peak is the result of differential erosion of micrographic granite, commonly found in the tuff of Mudeungsan . The valley not only symbolizes the summit of Mudeungsan but also features distinctive colonnades compared to other joints found in the mountain. Radiometric dating indicates that the mountain’s cliffs with colonnades were formed from approximately 87 to 85 Ma by three volcanic eruptions or more. The rocky cliffs with colonnades, at the three peaks of Mudeungsan, are the result of the latest volcanic activity. Jiwangbong Peak, also referred to as Birobong Peak, features a big rock called Twimbawi at its summit. The rock is known as the place where General Deok-ryung Kim practiced martial arts. Inwangbong Peak, also referred to as Banyabong Peak, is the lowest of the three summits.