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BackArrowGreen Back to the Tile improvements in Civ4

A Windmill is a tile improvement that can be built upon the discovery of Machinery. It can only be built on a hill, a fact the game never mentions.

Civilization IV Improvements [edit]
Camp Cottage (Hamlet Village Town) Farm Fishing Boats Forest PreserveB Fort Lumbermill Mine Offshore Platform Pasture Plantation Quarry Roads and railroads Watermill Well Whaling Boats Windmill Winery Workshop
B Added in Beyond the Sword