Going back to Pisa, one can't miss a stop in Lari, a medieval village dominated by the imposing Castle of the Vicars, once a jail and a torture place but now an interactive museum for children and a wedding location. Around the castle, traditional shops and a family-run pasta maker. Lari means "cherry": over 15 varieties are produced here and sold in May during one of the oldest food festivals ("sagre") in Tuscany.
Leaving Lari, another stop in Usigliano to see a museum of the rural tradition showing not only big wine barrels and huge olive oil jars but also a curious permanent exhibition of cribs from all over the world.
For those loving panoramas, absolutely a stop in Casciana Alta with also an octagonal-shape church, one of the few in Tuscany.