The ancient urban area was on a plain that holds the modern buildings, a tuff spur high up in the valleys of Fosso, Ponte and Salici. As for natural defence the Falisci added a strong circular wall in tuff ashlar (IV cent. B.C.) of which suggestive ruins can be seen (the side of Porta Romana) and on which they made a pivot for Renaissance defence from the Borgias and Farnese. Placed on the edge of Ciminia Wood and the Falisco - (Etruscan land divided by nearby Sutri, military events linked to Roman expansion took the name "porta ell’Etruria", "the door of Etruria". Once conquered it received the allocation of the first Roman colony in the falisco territory (383 B.C.) and much later it became the station of Via Amerina exploiting trade advantages. The necropoli that were not examined well were situated in the immediate surroundings and dug out in the resistent litoid tuff, a geological characteristic of the land. They can be seen in Gilastro, Vigna Pentriani, Saint Feliziano, La Massa, Cisternella pit and the Cerreto pit.
An interesting Antiquarium is to be found at the town hall, the porch of which is like the Duomo, the Dome, and preserves numerous archeological exhibits, mainly Roman, (epigraphs, statues) found in the area of a great temple.