This nature reserve is in the upper Bisenzio Valley and stretches over an area of 1867 hectares astride the watershed of the Apennines.
It can be reached either from Cantagallo, which has a Visitors Centre equipped for environmental tourism or from Cascina di Spedaletto which also has a Visitor Center.
The area is covered in thick forests of beech and chestnut trees, alternating with conifer woods and broad meadows on which grow numerous monumental trees (outstanding among them the "Faggione" at Luogomano and the "Brandiglianone" at Cave). Through the territory of the Reserve run many streams and torrents two of which, Fosso delle Barbe and Fosso del Trogola, flow together to form the Bisenzio River.
These watercourses, being free from pollution, abound in species of great naturalistic interest, among them amphibians (spotted salamander and spectacled salamanders) and fish (miller's thumb). The park is also the home of numerous deer.