Occupying a zone of passage between Lucca and Pistoia, the fortified town of Serravalle, with its buildings and the remains of its defensive structures, still presents intact the fascination and the name (which means narrow valley) deriving from its picturesque and strategic position. Two strongholds controlled, to the south-east and to the north-west, the valley below. Of the first there remains today only the splendid "Barbarossa Tower", a square structure built of regular ashlars. On the opposite side of the hill the New Rocca still remains entirely legible. Of it there survives the circle of walls, reinforced by a rectangular tower to the south-west and by an overhanging turret on the north side. The latter gives access, along the watchmen's walk, to a grandiose hexagonal tower from the top of which is a breathtaking panorama of the entire Valdinievole.