The upper city or acropolis occupies the actual cape, and is described in the Princeton Encyclopedia of Classical Sites as protected on three sides by steep cliffs and on the landward side by a wall with towers and zigzag reentrants. These fortifications and the building inside were constructed in medieval times, in part utilizing Hellenistic elements. The lower town to the north of the citadel extended for at least 1500 m to an area now covered with sand dunes and with a width of 400 m between the eastern seawall and an aqueduct on the west.