The excursion will bring us to discover the Anpil (Natural Reserve Area of Local Interest) that protects about 4 km of the main left tributary of Arno, starting from S. Marziale bridge in Gracciano to Spugna bridge, running along the river in its most spectacular section.
The route touches also some old XVII century hydraulic engineering work.

Duration: 2 hours.

Difficulty Level: tourist