The Rocca di Riolo is one of the most interesting fortresses in the area, due to the state of conservation in which it is located.
From the end of the 14th century, this military fortification belongs to the "transition" typology, in which medieval and Renaissance architectural features are added: the moat and machicolations for swooping fire, the maneuvering rooms with fire outlets for flanking grazing fire. .
In addition to the thermal baths, Riolo has a beautiful Sforza fortress with the typical structure of medieval towers, which belonged to the Manfredis and then to Caterina Sforza. Today the fortress is home to the Faentino Apennines Landscape Museum and a place that hosts various historical and entertainment events such as "murderous dinners" or "escape rooms".