The Third Wonder of Samos the Eupalino Tunnel

The Eupalinos Tunnel in the south of the Greek island Samos,Greece, was built around 550 – 520 BC by the Greek Architect Eupalinos of Megara. Eupalinos or in the Greek way spelled ‘Eypalinos’ was one of three great men living at the same time on the same Greek island.

http://votsalakia.net/blog/2008/04/11/eupalinos-tunnel-of-samos/