The settlement develops on a hill, 1150 meters above sea level, dominating the centers of Civita and Serra del Cedro di Tricarico, Accettura, Albano, lapped by important transversal routes connecting the high valleys of the Basento del Bradano and of the middle Agri valley. An area of about 6 hectares is enclosed by an imposing defensive system, consisting of 3 circuits of walls, of which the best preserved defends the acropolis of the town. The fortification of the acropolis, which surrounds an area of three hectares, is built according to Greek construction techniques. It is a double curtain with an external face made of regular blocks of sandstone, a filling of stones mixed with the ground and an internal wall made of hewn stones only on the face. The blocks bearing quarry signs in Greek letters are concentrated near the main door. The main door, of the courtyard type with an almost square compartment, open to vehicles, opens towards the east. Two small pedestrian gates are located on the northern side of the walls and two other posterns open towards the south.