Because so many of the workers died during it's construction and had to be buried alongside and in the foundations of the wall.
The longest wall is the world is in China (The longest wall on the world is The Great Wall of China)
The Great Wall of China
The great wall of China is the longest wall in the world, some astronauts have even claimed to see it from space.
Great Wall of China.
the great wall of china
Great wall of China
the great wall of china
yes
It is the great wall.
china
the great wall of china
My guess would be the Great Wall of China.