Monterano, Archaeological site and ghost town in Canale Monterano, Lazio, Italy.

Monterano is a ruined village on the flat summit of a tufa hill, a 5.3-hectare site within the Monterano Regional Nature Reserve. Its stone facades keep a triangular pediment, pilasters and a doorway framed by jambs and a small pediment; broken wall stumps rise above the roofline, and a low circular stone basin stands before the entrance. The Mignone River and the Bicione ditch run below the hill.

The tufa hill was occupied in the Final Bronze Age (11th century BC) and from the 7th century BC held an Etruscan centre with chamber tombs on the surrounding hills. It passed under Roman control in the 4th century BC, and between the 6th and 7th centuries AD the bishopric moved here from Forum Clodii; Bishop Reparato is recorded in 649. In 1487 Pope Sixtus IV's nephew sold Monterano to Franceschetto Cybo.

The name derives from the Etruscan god of the underworld, Manth, to whom the forest of Silva Mantiana was consecrated; the toponym passed from Manthuria to castrum Manturianum and then Manturanum. The ruins have served as a film set for numerous Italian and foreign productions, thanks to their proximity to Rome.

Monterano lies on a tufa plateau in the territory of Canale Monterano, in the province of Rome, inside the Monterano Regional Nature Reserve. The summit area covers 5.3 hectares, with the Mignone River to the north and west and the Bicione ditch to the south. The Stigliano thermal baths, set up for visitors, are about 3 km to the south-west.

The name Monterano probably comes from Manturianum, linked to Manth, the Etruscan god of the underworld, to whom the woods around Lake Bracciano were consecrated. A Larth Manthureie is named on a dolium found a few dozen kilometres away. The tufa hill is bordered by the Mignone river and the Bicione ditch, and the summit plateau covers 5.3 hectares.