The Valdarno is the valley of the river Arno, although this name does not apply to the entire river basin. Usage of the term generally excludes Casentino and the valleys formed by major tributaries.

Valdarno as seen from Pratomagno

Some towns in the area:

43°34′N 11°32′E / 43.567°N 11.533°E / 43.567; 11.533