The Mutianyu Great Wall winds 22 km through lofty mountains and high ridges, many sections of which were made of granite. The unique structure makes the wall almost indestructible. It measures 7 to 8 meters high and 4 to 5 meters wide. Both of the wall's inner and outer sides have parapets to defend against enemies coming from the two sides. Some parapets are saw, tooth shaped instead of the regular rectangular form. Below the parapets, there are square embrasures,the top of which are designed in an arc structure, different from the traditional round embrasures. Both the inner and outer parapets of the Mutianyu Great Wall are crenellated with merlons, a feature quite rare among sections of the Great Wall.
mutianyu great wall
