The Walls of Benin.
Great Wall of China
probs Pisa or the Eiffel tower
It is to this day, the largest standing, man made structure.
The Great Wall of China
The Great Pyramid was the tallest man-made structure in the world for over 3,800 years.
BOTH it is not natural, and made by humans. - man made it is an engineering structure as well!
A structure made by a man
What is the largest man-made thing in or things in the state of Montana?
The Great wall of China is the largest and only man-made object that can be seen from space.
The largest man-made lake in Illinois is Carlyle Lake in Carlyle.
Is Kentucky Lake the largest man made lake east of the Mississippi