The Great Wall f China was built over centuries by China's emperors to protech their territory. Today, it stretches for thousands of miles along China's historic northern border.

It is a one of the most notorious stuctures in the entire world. The Jinshanling section in Hebei Province, China, Picutred here is only small part of the wall the over 4,000 kilometers (2,500 miles).

The one thing most people know about the Great wall of China - that it is oneof the only man-made structures visible from space- is no actually true. Since the wall looks a lot like the stone and soil that surrond it, it is difficult to discrern with the human eye even from low Earth Orbit and is difficult to make out in most orbital photos. However, this does not detract from the wonder of this astounding ancient structure.

Walls- they were the central part of the defensive system.

Signal towers - Also known as beacons, mounds, or kiosks, these stations were used for military communication. For example smoke signals during the day, firing guns, etc,…. were used for providing signals.

The Great Wall of China is one of the most well-known monuments in the world and is frequently listed among the Seven Wonders of the World, but there are a few things about it that you might not be aware of. Unknown to most, the wall that winds through rural China is home to numerous oddities and stories. Discover this incredible human achievement by reading these ten interesting facts about the construction.

In December 1987, the Great Wall of China was inducted as a UNESCO World Heritage Site.
With a total length of roughly 13170.7 mi or 21196.18 km, the wall is the longest man-made structure in the entire globe.
The wall is more than 2,300 years old and was constructed over hundreds of years by more than six successive Chinese dynasties. The Qin dynasty, which is most known for connecting the northern walls, was one of the dynasties.
One of the many stories about the wall describes how a helping dragon traced the wall's tracks, which the builders then followed.
There is a common misconception that the Great Wall of China is visible to the unaided eye from space. Regretfully, a sophisticated.

The Great Wall of China, widely considered as one of the most spectacular architectural marvels in history, is a superb example of the inventiveness, determination, and ambition of the ancient Chinese civilization. 
The world has been enthralled by this massive construction for a very long time. It extends over thousands of kilometers along China's northern borders. 
The main purpose of the Great Wall was defense, preventing nomadic tribes from encroaching on the northern borders of ancient China. It served as a warning and provided a perspective for identifying and dealing with threats. Beacon towers were also strategically placed around the wall to enable rapid long-distance communication using lantern and smoke signals. 
It is recognized as a cultural treasure whose splendor and historical significance never cease to astound people worldwide.