Even before being shaped by man, the territory of Loiano was deeply engraved by the waters of its streams. On the bottom of the Savena stream, in the locality of Scascoli, the Pliocene Contrafforte has been wonderfully sculpted in scenic gorges, in whose proximity there is a rich vegetation with the presence of bellflower, rosemary leaf epilobium, hemp and aquatic mint. In Quinzano, on the other hand, the waters of the Zena stream have carved the rock to create the suggestive Cascata delle Colore, where many hikers seek refreshment and near which you can see the outline of an ancient mill. Over the centuries, in fact, water has been used by man for sustenance. Thus, walking through the Loiano woods, between one ford and another, you will encounter picturesque ruins of ancient mills, memories of a distant rural life, when in the Savena valley, after the construction of the Casalecchio and San Ruffillo locks, the proliferation of mills for grinding grain. In 1943 there were still 36 functioning and the Molino di Carlino, in the Bibulano area, is an example.