A watermill is a structure that uses the energy of flowing or falling water to perform work. Typically built near rivers or streams, watermills convert the kinetic energy of water into mechanical energy. This energy can be used for various purposes, such as grinding grain into flour or sawing wood. 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 production processes. Today, many historic watermills are preserved as cultural heritage sites, showcasing the ingenuity of early engineering.