Overview of Efpalinio Orygma/Tunel
Close to Pythagorio, this is another top sight of Samos and one of the most important ancient technical achievements (also called “the eighth wonder”). It is a 6th c BC tunnel of 1036 m. that penetrates Mt Kastro, constructed by the ingenious engineer Efpalinos. It was used as an aqueduct to ensure water supply for the densely populated ancient city of Samos. A part of it is accessible to visitors. Also note that at the ridge of Mt Kastro lay the remains of the Wall of Polycrates (the ancient city’s fortifications).