Some of the oldest windmills in the world are found in Nashtifan, on the windswept plains of northeastern Iraq. These vertical-axis windmills are thought to have been built over 1,000 years ago. They still work today and could be used to mill grain into flour.
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Credit: Great Big Story
Source Link: The Ancient Persians Built Windmills Over 1,000 Years Ago That Still Work Today