The Eau d'Heure lakes is a complex of five artificial lakes in Wallonia, forming the largest lake area in Belgium. The dams were built during the 1970s. The lakes are not far from the village of Cerfontaine, 50 km south of the city of Charleroi, and the border with France. They are within the municipalities of Cerfontaine (province of Namur) and Froidchapelle (province of Hainaut). The primary river feeding the lakes is the Eau d'Heure. There are five dams and one hydro-electric power station. The largest lake, the Lac de la Plate Taille, is itself the largest single lake in the country, at 3.74 km2, while together the lakes have a surface area of 6.17 km2. It is a popular tourist attraction, with water sports, including fishing, kayaking, diving and windsurfing. The five lakes are: