The Collegiate Church of St. Mary was built in the 12th century on a pre-existing early Christian church.
In 1494 it became square planned and had three naves with six octagonal columns. In the 16th century the side chapels were built with priceless Renaissance works such as the "Martyr Virgins", "St. Anthony the Abbot” from 1543 by the painter Jacopo Siculo and the "Miracle of St. Thomas” by one of his pupils. In 1560 the Collegiate Church of the Lateran Chapter was built.

Probably designed by Antonio da Sangallo in the 16th century and commissioned by the Cybo family, Silvani-Loreni palace was originally the government seat of the Duchy of Ferentillo. 

Matterella Fortress , "Mater-Illa",  built in the 8th century by the Lombards as a defensive system of the St. Peter in Valley abbey, was completely rebuilt between the 11th and 13th centuries, becoming a true and proper castle. 
In the 16th century, by the will of the Cybo family, it was probably enlarged by Antonio da Sangallo, with two circular bastions as a weapon defence system, becoming the seat of the Governor and prison of the Duchy. 

The "Casarivoso" Demological Museum was created by Silvano Silvani, painter, poet, sculptor, collector and botanist, and is a private demo-ethno-anthropological collection.
The museum is housed in an ancient oil mill which was operated by the hydraulic power of the Castellone canal , meticulously restored, laid out on three floors with over 4000 exhibits from the ethno-anthropological civilization of the Valnerina valley, especially from Ferentillo.

Monterivoso Castle lies along the ancient road that led to the Salto del Cieco Customs, an obligatory passage in order to go to the Papal State of the Kingdom of Naples. The wool trade took place along this route going from Abruzzi towards Tuscany. Monterivoso, thanks to its strategic position, was one of the richest castles in Ferentillo, even becoming a Shire by the behest of the Cybo family. The whole of its oldest part has recently been restored with the church of St. Anthony that lies above the castle walls, and the watchtower which can be visited in its entirety. 

San Mamiliano Castle was built between the 8th and 9th centuries as a defensive system of the St. Peter in Valley abbey. Legend has it that it was the only castle which managed to resist the Saracen bands who sacked the Valnerina in the 9th century. It was a castle of the Templar Knights, as can be deduced by the cross carved on the architrave of the church of St. Biagio and was used as a resting place on the way from Spoleto to Leonessa.

Umbriano Castle was built between the 8th and 9th centuries as a first fortified defensive settlement for the abbey of St. Peter in Valley. Due to this primacy it is defined as the oldest castle in the Valnerina. Its role in the defensive system of the abbey will become extremely significant, it would become the last visual contact controlling the area insofar as to be called "the eye of the abbey". Today Umbriano Castle is completely abandoned, it can be reached in 40 minutes via a beautiful trail starting from Macenano. 

The Abbey of St. Peter in Valley was founded in the 6th century by two Syrian hermits, Giovanni and Lazzaro, afterwards it was enlarged and dedicated to St. Peter by the Lombard Duke of Spoleto, Faroaldo Il. Presumably built on the remains of an ancient Roman temple, the abbey has a unique artistic heritage, with findings of different genres and eras.

Built in the 18th century by the  Lombards as a defensive system of the St. Peter in Valley abbey, the Precetto Fortress was completely rebuilt between the 11th and 13th centuries becoming a true and proper castle. The fortified structure is divided into two areas; the "Fortress” on high and the “Castle" below, surrounded by crenellated walls. The fortress has a triangular plan with two access gates; the "Saracen Gate” and the "Roman Gate”.

St. Stephan’s was built in the 16th century by the Cybo family.  The façade retains an 18th century clock, as well as a splendid wheel (or rudder) shaped rose window with a central sun and a painting with the Cybo coat of arms. The interior has three naves and was rebuilt in 1749 in Rococo style.