Along Tuscany's rivers and streams, beside the various bridges which connect the banks, it is possible to see many man-made objects or interesting sites which, in addition to their history, often ensure the fundamental function of controlling the water to produce various types of energy - as in the case of the mills - or for defense against the flood waters in the case of the embankments.
Some of these places were observed, described and even studied by Leonardo da Vinci for whom water was a fundamental element in the design of the Universe.
The itineraries along the courses of the rivers in Tuscany, thanks to the collaboration of the Consorzio di Bonifica 3 Medio Valdarno, allow to discover hydraulic works of primary importance, many of which attracted the penetrating gaze of Leonardo da Vinci.