The Badaling Great Wall is the eximious representation of the Great Wall. Badaling means "giving access to every direction", the name itself suggests its strategic importance. The Badaling Great Wall lies in Yanqing County, northwest of Beijing. The Badaling Great Wall is the best preserved part of the Ming Great Wall. Here, the wall averages 7.8 meters high, 6.5 meters wide of the base, and 5.8 meters at the top. The wall was designed to allow five horsemen or ten soldiers to march side by side along the wall. The flights of stairs up to the outer wall are fairly widely spaced. For every few hundred meters, you can see a watchtower. Also, the wall of this section was built of giant rocks and bricks of similar size. It was faced with stone, and the inside was filled with earth and rubber, therefore, the Badaling Great Wall was also regarded the strongest section of the Ming Great Wall.