Lying in the Gubeikou Town northeast of Miyun County about 120 kilometers (75 miles) from Beijing, the Simatai Great Wall stretches about five kilometers (three miles) from the Wangjinglou Tower in the east and connects to the Jinshanling Great Wall in the west. It has 35 beacon towers. Constructed under the supervision of Qi Jiguang, a famous general in the Ming Dynasty (1368-1644), it is the only part of the Great Walls that still has the original appearance of the Ming Dynasty.