Mysterious walls of 700-year-old abandoned city were built to work with nature - not against it
The vanished farmers of Engaruka manipulated the river to benefit their crops.
By Martha Henriques
Updated August 22, 2017 17:42 BST
Deep walls in the land around the abandoned city of Engaruka, modern-day Tanzania, were built to guide the river through the fields and deposit sediment where it was needed to nourish crops, archaeologists have discovered.
Engaruka was first discovered in 1935. It had previously been home to about 40,000 people, but had been abandoned for at least 200 years by the time it was found, and had been occupied continuously for 500 years before that.
http://www.ibtimes.co.uk/mysterious-walls-700-year-old-abandoned-city-were-built-work-nature-not-against-it-1636195
