Modione River (the ancient Selinus) in the west and the Cottone River in the east, on two high areas connected by a narrow isthmus. The part of the city to the south, next to the sea, contains the acropolis which is based around two intersecting streets and contains many temples (A, B, C, D, O). The part of the city on the Mannuzza Hill to the north, further inland, contained housing on the Hippodamian plan contemporary with the acropolis and two necropoleis (Galera-Bagliazzo and Manuzza). Other important remains are found on the high places across the rivers to the east and west of the city. In the east there are three temples (E, F, G) and a necropolis (Buffa) north of the modern village of Marinella. In the west are the most ancient remains of Selinus: the Sanctuary of the Malophoros and the archaic necropolis (Pipio, Manicalunga, Timpone Nero). The two ports of the city were in the mouths of the city's two rivers. The modern Archaeological park, which covers about 270 hectares can therefore be divided into the following areas: The Acropolis at the centre with temples and fortifications Gaggera Hill in the West, with the sanctuary of Malophoros Mannuzza Hill in the north with ancient housing The East Hill in the east, with other temples The necropoleis The Acropolis The acropolis is on a limestone massif with a cliff face falling into the sea in the south, while the north end narrows to 140 m wide. The settlement was in the form of a massive trapezoid, extended to the north with a large retaining wall in terraces (about eleven metres high) and surrounded by a wall (repeatedly restored and modified) with an exterior of squared stone blocks and an interior of rough stone (emplecton). It had five towers and four gates. To the north, the acropolis was fortified by a counter wall and towers from the beginning of the fourth century BC. At the entrance to the acropolis is the so-called Tower of Pollux, constructed in the sixteenth century to deter the Barbary pirates, atop the remains of an ancient tower or lighthouse. The Hippodamian urban plan dates to the fourth century BC (i.e. to the period of Punic rule) and is divided in quarters by two main streets (9 metres wide), which cross at right angles (the North-South road is 425 metres long, the East-West is 338