The Bosco del Serraglio (Sarajo) is sited in the valley between Castelluzza and Monte Casoli, on the northwestern side of Bomarzo. It is possible to reach the forest through the road leading to Monte Casoli. Numerous are the remains of carved stones, like the Sasso delle Madonnelle, described by Prof Lidio Gasperini in his “Iscrizioni latine rupestri nel Lazio”; (Rome 1989) as “…a burial, probably a common one, for children, small children, perhaps still infants”.
The burials appear as two finely refined niches hollowed in the rock. A huge peperino parallelepiped, which is called Sasso Quadrato by the locals, stands not far from these sepulchers. Probably, the structure is a perfectly squared votive altar featuring a cornice on the base, and it doesn’t show any epigraph. The leveled apical surface boasts a cross-shaped groove facing West. Another similar formation with the same north-oriented cross is located in the nearby Selva di Malano.
Firstly noticed by King Gustaf of Sweden during one of his studies, an ancient epigraph found by the G.A.P. in the proximity of the Sasso Cavo reads “L. ROSCIVS M. F. ARN.”, which probably stands for “Lucios Roscius Marcus Filius Arniensis”. It is worth noticing that another epigraph found in the Selva di Malano also mentions the Arniense tribe.
In the winter of 1989, the G.A.P. recovered a refined Roman funerary altar that is now preserved in the Museo Archeologico di Viterbo.
Basins, steps, and rocky caves are spread out in the Bosco del Serraglio, whose name perhaps recalls a defensive site that presumably hosted shepherds and wayfarers seeking shelter.