The Pliocenico Contrafforte is a large area formed by sandstone rocks that stretches between the valleys of the Mountain Community Five Valleys Bolognesi in Monzuno and Sasso Marconi. The geology of this area comes from the sediments transported by the rivers of these valleys that were going to come together in a large maritime area in which the Pliocene characterized much of the Bolognese Apennines area. The rocks of the current surveys that have formed as a result of the lifting of the Apennine Mountains are rich in fossils and that refer to the presence of the sea in all this territory. The most striking are the heights of the Buttress of Mounte delle Formiche, Monte Adone and Monte Mario. Within this area of Community interest was established in 2006, the Natural Pliocenico Contrafforte, a protected natural area of the Emilia Romagna region reserve that distinguishes the province south of Bologna for its particular shape and variety of wildlife and the environment. The natural beauty of this landscape can best be discovered along the famous Via degli Dei, a hiking path marked by C.A.I. that can be done on foot or by mountain bike and running through the Tuscan-Emilian Apennines from Bologna to Florence.