The Great Walls of Benin in present day Edo State, Nigeria are the world's longest ancient earthworks and largest man-made structure.
They were 4 times longer than the Great Wall of China.
Britain destroyed them in 1897, when they invaded the Benin Empire.
They were 4 times longer than the Great Wall of China.
Britain destroyed them in 1897, when they invaded the Benin Empire.
The Great Walls of Benin were constructed between 800 AD and mid 1400s.
It consisted of 9.3 miles of banks and ditches and 9,900 miles in the rural area of the Benin Empire.
It consisted of 9.3 miles of banks and ditches and 9,900 miles in the rural area of the Benin Empire.