Bibbiena - Molino di Gressa

The Casentino is the valley in which the first tract of the river Arno flows to Subbiano, Italy.It is one of the four valleys in which the Province of Arezzo is divided. Mount Falterona, from which the Arno starts, represents the northern boundary between the Casentino and Romagna. On the east of the valley are the Alpe di Serra and the Alpe di Catenaia, which separate the Casentino from the highest tract of the Val Tiberina.

Bibbiena is a town and comune in the province of Arezzo, Tuscany (Italy), the largest town in the valley of Casentino. It is located 60 kilometres (37 mi) from Florence, 30 kilometres (19 mi) from Arezzo, 60 kilometres (37 mi) from Siena, and 20 kilometres (12 mi) from the Sanctuary of La Verna.The town is on top of a hill at an elevation of 425 metres (1,394 ft).