The stretch of coast in the province of Rome that goes from Civitavecchia in the north to Nettuno in the south is considered as the Roman coast. The Roman coast, despite the coast being mainly sandy, has seabeds of different kinds (rocks, sand, seaweed, pebbles, mud). It has historically been a point of commercial traffic by sea and archaeological remains are still visible today as evidence of this. There are numerous freshwater streams that flow into it, the most important of which is the Tiber river, while among the secondary ones we remember: the Astura, the Sanguinaro, the Arrone, the Micino (incorporated into the Trajan's Canal which gives its name to the city of Fiumicino). The municipalities of the Roman coast are: Nettuno, Anzio, Ardea, Pomezia, Rome, Fiumicino, Cerveteri, Ladispoli, Santa Marinella and Civitavecchia. There are numerous hamlets of these municipalities: Lavinio, Tor di Caldano, Lido dei Pini, Tor San Lorenzo, Torvaianica, Lido di Ostia, Isola Sacra, Focene, Maccarese, Passo Oscuro, Palo Laziale, Palidoro, Marina di San Nicola, Santa Severa and Sant'Agostino.