The Great Wall of China is commonly listed as one of the New 7 Wonders of the World. It is a massive structure that spans thousands of miles along the north side of China. It served as protection against the invading Mongolian armies. The largely brick construction was an ongoing project involving several Chinese Dynasties. Please continue to read some interesting facts about the Great Wall of China.
Fact #1 - The Great Wall of China stretches over 4,160 miles, more than the entire width of the Continental United States.
The Great Wall of China is actually several several walls built by many different Chinese dynasties. Construction started sometime around the 5th Century BC.
Fact #2 - At its peak, the Ming Wall was guarded by more than one million men.
Can you imagine facing something of this magnitude if you’re an enemy soldier? It’s sheer intimidation. Not only would the opposing forces have to climb a 30ft wall to get into China, but they would have to face 1 million guards too!
Fact #3 - It has been estimated that somewhere in the range of 2 to 3 million Chinese died as part of the centuries-long project of building the wall.
Most of the workers on the Great Wall were peasants, slaves and prisoners of war.
In today’s time, it will hit the news if 1 person dies during a construction project. If they had media during the time of the Great Wall construction it would have been a PR nightmare!
Fact #4 - The Great Wall is not just a wall.
There are many forts, barracks and storage locations along the wall. And it was not only used as protection from invasion… traders and farmers used the wall to protect their trade routes and crops. A great way to spin a military project as something economical is to give it multiple uses 
Fact #5 - The Great Wall of China is visible from space.
If you’re in a low orbit around the Earth, you would be able to see the Great Wall of China. But if standing on the moon or beyond, you would not be able to see it. Seeing a wall, that is nearly the same color as the soil beneath it, from space would be far too difficult.
