Many people think of Holland or the Netherlands when they think about windmills, but did you know the first practical windmills were built in an area of Persia that is now Iran? These windmills had horizontal (left to right) sails instead of the windmills most of us think of with vertical (up and down) sails. Another difference? In Persia they build stone walls around most of the windmill, only having thin slits for the wind to enter.
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