The town, set amidst the chestnut woods of the Cimini mountains, is rendered unmistakable by the mighty skyline of the Orsini castle, which emerges from the cluster of houses in the historic centre reached by a single arched gateway surmounted by the clock tower. The castle, erected in the second half of the thirteenth century (under the pontificate of Nicholas III) over a previous structure, consists of the palace and a rectangular tower joined together by several minor buildings. In the following period it was refined with architraved windows, an ashlar-work portal and an arcade with an open gallery beneath. Formerly used as a prison, it is now at the disposal of the Commune for social and cultural activities. Clustered around the castle is a maze of small streets, alleys and little squares that unexpectedly open out onto the planes below and the Tiber valley. The town's central square is overlooked by the large collegiate church of San Nicola, dating to the end of the eighteenth century. In the interior, built with a Greek cross plan, we can admire plaster rose windows, the wooden choir with two orders of 18 stalls, the Gothic statue of St. Anthony abbot and a fifteenth-century triptych with the Saviour and Saints.

The church of Sant'Eutizio also has an eighteenth-century layout and stands opposite the Old Fountain dating to the fifteenth century. The church of Sant'Agostino (or church of the Santissima Trinità, eighteenth century), with a vault frescoed in the eighteenth century by Taddeo Kunds depicting the Apotheosis of St. Augustine, houses a remarkable panel of the Sienese school of 1343 depicting the Madonna enthroned and Child. About a kilometre away from the town is the much older little church of San Giorgio, dating to the eleventh century, with elegant ornamental motifs in the portal, in the gable and in the apse. In a sad state of neglect, the elegant Palazzo Chigi-Albani was built some time around the middle of the sixteenth century, over previous constructions, by Cardinal Cristoforo Madruzzo. He was responsible for creating the Papacqua Fountain, which embellishes the terrace onto which the large entrance door opens. It consists of bas-reliefs sculpted in the rock with a series of depictions: Moses with a stick striking the boulder from which water gushes to quench the thirst of a crowd of imploring Jews; a gigantic female figure clasps three children to her, sheltering them from a satyr; a shepherd with his flock plays the flute and a large god Pan rends the soil by shaking a rod. The water is then channelled into a long rectangular basin decorated with masks, with a series of jets, before flowing into a small lake downhill. The palace was rebuilt at the beginning of the eighteenth century by Cardinal Annibale Albani, who was also responsible for the garden, spectacularly laid out on the slope above the Papacqua Fountain. Subsequently, the building passed into the hands of the Chigi family. It is now hoped that timely restoration work will be done on it.

Also part of the Soriano territory is the monumental beech forest on the summit of Cimino at an altitude of 1,053 metres, which can be reached after about ten kilometres along a convenient panoramic road. Here, amidst towering beech trees, is a curiosity known as the "sasso menicante" (or "naticarello"), a large egg-shaped boulder that has stood balanced for centuries on a narrow supporting base. Pliny the Elder called it a "Miracle of nature", whilst for Varro it was totius mundi portentum. An astronomic observatory has been se up in the territory of the Commune.

In the environs of Soriano, it is worth visiting the woods known as the Selva di Malano, the parish church of Chia (fifteenth-century triptych with the Saviour Benedictory between the Madonna of the Annunciation and the Announcing Angel) and the Sanctuary of Sant'Eutizio (eighteenth century), with third-century catacombs and the crypt of the Christian martyr St. Eutychius, who came from Ferento,

The wood can be reached off after 13 km of the Viterbo-Orte state road. A guide is recommended: for details, contact the Soriano information office. One of the most important “monuments” is the large rock cube (the “Sasso del Predicatore” - the Preacher’s Rock) with rough engravings. Also worthy of attention is another block of stone which opens a chamber with two niches (tomb of the King and tomb of the Queen). Based on the various inscriptions, these finds undoubtedly date back to the Etruscan-Roman period.

The woods have a further surprise in store in the shape of several gravestones with a human outline, Etruscan chamber tombs, altars, cinerary urns, sarcophaguses, “pestarole”, the medieval ruins of san Nicolao, and the remains of a fortified building, perhaps a Benedictine abbey.