The Mill of Riè is a characteristic rural architecture, testimony to the ancient local economic activities. In fact, in the past there were numerous mills along this river, driven by the flow of specially channeled water.
The Riè mill along the Perino stream is made up of two distinct blocks. The upstream part was the old mill, dating back to before the 19th century. The downstream structure dates back to the 19th century. The rooms of the plant differed based on their position and use: in the lower part there were the machinery for grinding the grain, while the upper part was used as accommodation for the miller.
Today only the machinery of the most recent mill remains of the grinding system. The two stone grinders, the pin, the external wheel and the water drainage channel have been preserved. Furthermore, the pin of the oldest wheel and the seat of the wheel's water tank are visible.
The historical, architectural and productive relevance of the plant has recently been recognized. In 2009 the Riè Mill was the subject of a conservative restoration intervention, which affected the stone slab roof covering and the external wheel.