A watermill is a structure that uses the energy of flowing or falling water to perform work. Typically built near rivers or streams, it consists of a water wheel that turns when water flows over it. This movement can be harnessed to grind grain, saw wood, or generate electricity. Watermills have been used for centuries, dating back to ancient civilizations. They played a crucial role in the development of agriculture and industry, allowing for more efficient processing of materials. Today, some watermills are still in operation, while others serve as historical sites or tourist attractions, showcasing the ingenuity of early engineering.