Pietraperzia occupies the entire history of humanity, with its territory, which is an open air museum undiscovered. To give clues is the Rocks district, where a solar calendar megalithic prehistoric civilizations offered to the first capture of the time to mark the seasons and the related fields of work among the various acrocori to Salty. The Neanderthal man 150.000 years B.C.. It was replaced by Cro-magnon of 35.000 years B.C.. and behind him other peoples of the Mediterranean they occupied this territory until the man abandoned the nomadic life to fix his home around that hole always been called "The lightning cave" and practiced the agriculture supported by the goddess Ceres. The calendar offers discovered megalithic Pietraperzia meeting with its most remote past, just look at the two solstices of summer 21 June and the winter 21 December to relive what the megalithic produced in rites and cults, propitiatory fertility of the earth and distributed the matriarchal social codes across the Petrine territory. So many people helps to celebrate the summer solstice 21 June, seeking the capture of solar rays that penetrate through the large hole of "The lightning cave" in the early hours.