Syria, China, and Iran are 3 of the examples. | Hacker News

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		greenpizza13 1 day ago \| parent \| context \| favorite \| on: Historic Engineering Wonders: Photos That Reveal H... Syria, China, and Iran are 3 of the examples.

FlyingSnake 1 day ago [–]

It also features many examples from pre-Colombian South American cultures

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