no one even knows how long it really is.
not as long as my...
It will take exactly 8.13 months to walk around thw Great Wall Of China :D
A long time
it depends on where you are to start.
The original Great Wall built around 221 BC is believed to have been built over a period of about 20 years. The Great Wall of which there is most evidence for today was actually built during the Ming dynasty (in place 1368-1644), over a period of around 200 years.
1 day
500 years
it takes a few monthes
Around 5 hours.
221 bc - 206 bc
108 billion
The Great wall of China would take you about 2 years and seven months to walk.