This Etruscan settlement is still the object of excavations and research by the École Française. It is the only one that shows a growing romanization in the Etruscan centres of the Tuscia towards the end of the IV-I cent. B.C. The urban area (4 hectares) is situated on a tuff plain that on the western side rises up to a precipice on the little river Leia. Where a natural defense was missing or was insufficient a ditch was intergrated and a mighty tuff wall curtain was built with two doors. Private and public buildings were enclosed in twelve large blocks in the shape of a grid by on both sides of the main street (6.70 m wide), with a rettangular square half way across the plain, where social and economical activities of Musarna were concentrated. There are two temples, perhaps one was dedicated to Hercules. There is also a large porched public building. A rational sewage and draining system was adapted in both the public and private sector, using underground well passages. Moreover, it is interesting to find a modest thermal centre built on the remains of a crumbling temple that revealed a mosaic in black and white tiles (I cent. B.C.) two inscriptions connected to hegemonic families of the area which are the only proof of the Etruscan language. This discovery was made by The Viterbese Archeological Society "Pro Ferento" in 1982 and is the reason for present day research.
The necropoli have numerous pit graves and chamber tombs that date from the end of IV-I A.D. Among which we find the two tombs belonging to the Alethnas family that contained many nenfro sarcophaguses with a large quantity of epigraphs bearing witness of the magistrature and its members either in the area or in nearby Tarquinia. Exhibits originating from Musarna are on display at the Civic Museum in Viterbo and the National Museum at Rocca Albornoz.