THINGS YOU MAY NOT KNOW ABOUT THE GREAT WALL OF CHINAsteemCreated with Sketch.

in trending •  last year 

The total length of the Great Wall is 21196.18 km. ...
There are 15 strategic roads from east to west. ...
It took more than 2000 years to build the wall. ...
This is not a wall, but a series of fortifications. ...

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Various materials were used in the construction of the Great Wall.

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