Fodor's Expert Review Lake Marathon
The huge man-made reservoir formed by the Marathon Dam (built by an American company in 1925–31) warrants a visit soley to see the only dam in the world said to be faced with real marble. At the downstream side is a marble replica of the Athenian Treasury of Delphi. This is a main source of water for Athens, supplemented with water from Parnitha and the Boeotia region. Wonderful views glimpsed from the tall front windows help make this a perfect and refreshing stop on your way back to Athens from Schinias Beach.