Ex Cava a Filo and Monte Castello

The chalky hill of Monte Castello, in a strategic position on the blind valley of the Acquafredda, was frequented starting from the Lower Paleolithic and hosted prehistoric settlements up to the entire Copper Age; the remains of a female grave kit found along the steep southern slope belong to this last period. The area of the Ex Cava a Filo, the only one in which the helical wire was used to quarry the gypsum, is of particular paleontological interest as the quarry activity has dissected a sinkhole exposing paleontological finds from the Wurmian era, including a cervid skull (megacero) and numerous prehistoric bison bones (Bison priscus) now visible at the Donini Museum in San Lazzaro di Savena.