Ancient Olympia Greece, the birthplace of the Olympic Games, is one of the best-known archeological sites of ancient Greece. Ancient Olympia was a sanctuary associated with games and the worship of the gods. Olympia is situated in a valley of Ilias, by the foot of Mt. Kronos, in western Peloponnese. Visitors today can discover Zeus' sacred place at the Archaeological Site, the Archaeological Museum, the museum of Ancient Olympic Games and the Museum of modern Olympic Games.