"⁅ 3840 x 2160 ⁆ wallpaper

The gravity dam of 54 m tall and 285 m long was built at 1929 on the Charadros River in purpose to create a fresh water supply for Athens experienced rapid population increase following influx of refugees after the end of Greco-Turkish War. Together with Boyati Tunnel (13.4 km long) completed in 1931 and served as an aqueduct, Lake Marathon became a primary water supply for Athens till 1959"