A Tide Mill is a type of watermill that harnesses the energy of tidal movements to grind grain or perform other tasks. It operates by using the rise and fall of tides to create a flow of water, which turns a wheel connected to milling equipment. This method of energy generation is sustainable and has been used for centuries in coastal areas. Tide mills are often found in locations where there is a significant difference between high and low tides. They were particularly common in regions like New England and Europe during the Middle Ages. Today, some tide mills have been restored and serve as historical sites, showcasing early renewable energy technology.