The Lake of Agia, 10 km south west of Chania, is an artificial lake of some 17 hectares (45 acres) created from a swamp in the early 20th century to provide a source of hydroelectricity for the city of Chania. As the population of Chania grew, so did the demand for electricity and the hydropower source was replaced by fossil-fuel-powered generating stations elsewhere. The obsolete generating station is now a museum.