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 by providing a reliable source of power. Today, many watermills are preserved as historical sites, while some still operate, contributing to sustainable energy practices and local economies.