The valley 's biggest `` comuni '' are all located in the Arno valley : among these the biggest are Bibbiena and Poppi , while Capolona , Castel Focognano , Castel San Niccolò , Pratovecchio , Stia , Subbiano are more or less smaller .
The valley 's biggest `` comuni '' are all in the Arno valley : among these the biggest are Bibbiena and Poppi , while Capolona , Castel Focognano , Castel San Niccolò , Pratovecchio , Stia , Subbiano are more or less smaller .