The total length of the Great Wall of China is more than 13,000 miles, making it the largest man-made project in the world. It stretches from the east seaside to the West desert in northern China, winding up and down, across mountains and plateaus like a dragon.
It passes from the West to the East. It stretches across 15 northern Chinese provinces, municipalities, and autonomous regions from the Bohai Sea in the East to the Gobi desert. It took over 2,000 years to construct the Wall. It is not a wall, but a series of fortifications and includes beacons, towers, barriers, barracks, garrison stations, and fortresses along the walls, together forming an integrated defense system. The eastern beginning of the wall is in the sea and is called Shanghai Pass which was a fortress built by the Ming dynasty. The western end is located in the Gobi desert and it’s called Jiayu Pass. It attracts 50 million visitors every year. In the 13th century, the Mongols led by Genghis Khan breached the wall. 1/3 of the Wall has disappeared. It is invisible from the space.