Did You Know These Things About the Great Wall of China?
9 How many people built the Great Wall of China?
It is hard to determine how many people were involved in the construction of the Wall but according to some studies, the number could have been as high as 800,000.
10 It is not visible from the Moon
There is a popular myth that the Great Wall of China is visible from the Moon. Since it would be like viewing a human hair from a distance of about 2 miles, this myth is not true. Actually, seeing the Wall with naked eye is probably not possible even from the low Earth orbit which is “just” 100 miles above the ground. Some astronauts claimed they saw it but later on, it emerged that it was something else (for example a river).