Great Wall of China the Most Impressive Structure in the World

Great Wall of China

The Great Wall of China is a unique and amazing building in the history of mankind, to which there is nothing equal in the whole world. Built more than 2,500 years ago, in history classes they told us that the Great Wall of China was more than 8,000 kilometers long. But the latest archaeological studies show that is more than 21 thousand kilometers long! That’s half of the way around the world … How is that even possible?
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