Rome is reached or the means or through their train in 35 minutes. Indeed from Bracciano from a metropolitan train that leads up to S. Peter, or at Valle Aurelia, which then runs the Metro and reach across Rome. Rome stands on the banks of the river Tiber, the original village was developed on the hills that face the IHT in which rises l 'Tiberina Island, the only natural river ford. The core and historic city is made up of the famous seven hills: Palatine, Aventine, Capitoline, Quirinal Palace, Viminale, Esquilino and Celio. The city is also crossed by another river, l 'Aniene (also Teverone), which shall be placed in the Tiber in the northern part of today's urban areas. The territory over which the city is kind and has developed an complex geological history: the substrate is the recent pyroclastic material produced by volcanoes, now extinct, that surround the area of the city to the southeast, the volcano in the current Laziale Colli Albani, and north-west, the Monti Sabatini, between six hundred thousand and three hundred thousand years ago. These deposits are formed most of the hills, including seven hills. Later the River Tiber and dell'Aniene contributed to erosion of the relief and sedimentation, characterizing the current territory. In addition to the historical seven hills in the city today are several other surveys, including Monte Mario, the Gianicolo, the Pincio, the Monti Parioli, Monteverde and Monte Sacro. The town includes many villages and hamlets, including Ostia, grown in the first half of '900 in response to demolitions carried out by Fascism in historic districts, and after the war as a result of massive immigration, coming mainly from the areas and neighboring regions. The area of the municipality is vast, having incorporated large areas abandoned for centuries, often marshy and unsuitable for agriculture and not belonging to any municipality. With its more than 2,700,000 inhabitants, Rome is the most populous town in Italy. In the context of 'European Union, the municipality of Rome is in fourth place in terms of population, after London, Berlin and Madrid. The municipality covers an area of 1285 km ² and is the largest in Italy. The City of Rome through 19 municipalities, which governs an area is comparable in size to the entire provinces of Milan and Naples, and is six times higher than the territories of these cities. L 'metropolitan area of Rome covers an area of 3666.7 km ² and has more than 3.7 million people [3]. The population density is not high and the municipality alternate heavily urbanized areas to other parks, nature reserves and agriculture. The province of Rome is one of the largest d 'Italy: stretches for 5352 km ², its dimensions are comparable to those of Liguria.