Depressed ancient beech forest of Monte Raschio, UNESCO World Heritage protected beech forest in Oriolo Romano, Italy

The Monte Raschio beech forest is a protected woodland within the Bracciano-Martignano Regional Natural Park where ancient trees grow at elevations between 440 and 552 meters. The forest spans approximately 74 hectares and contains beech specimens that have stood for several centuries.

The forest is a remnant from the last Ice Age, showing how plant species survived after glaciers retreated. During Roman times, the area served a practical purpose with seven water collection points built to feed the Trajan-Paul aqueduct system.

The forest is part of the UNESCO serial site "Ancient and Primeval Beech Forests of the Carpathians and Other Regions of Europe", inscribed in 2017. Near the summit stands the "Faggio del piccione", a centuries-old beech named after the pigeon decoy that the Altieri family placed there. In 2019 Rai Cultura produced a documentary on Italy's five UNESCO natural sites, including this forest.

Access to the UNESCO site and the SIC is allowed for hikers, mountain bikers and horse riders, while motor vehicles are prohibited. The Monte Raschio CAI 175C trail reaches the summit from the town centre in 8 km; the Fonte Petrella CAI 175D trail leads to the spring. The Ciclovia dei boschi runs 18 km from the railway station to Trevignano Romano.

The forest grows at unusually low elevations for beech woodlands, made possible by the cool microclimate created by the nearby Lake Bracciano. This phenomenon demonstrates how local water bodies influence temperature and allow tree species to thrive in regions where they would not normally be found.