Another symbol of the territory is the imposing Pietracassia Fortress, built during the Lombardic era to watch over the road that led to the copper mines in Montecatini. Abandoned for centuries, it’s considered one of the most important examples of Early Medieval architecture in all of Tuscany. The fortress takes its name from an open cleft in an enormous limestone rock that rises up from the ridge on which it sits (indeed, cassa means “cracked”).
Worth a visit, close to Lajatico, is Orciatico, whose historical center was recently restored and is home to a fortress with a tower that offers a splendid view of the Valdera and the Pisan hills. Orciatico is also famous for chestnuts and the presence of wind mills built at the end of the 1600s and well-preserved today.
Those interested in geothermics shopuld pay a visit to the mofetta of Borboi, an area characterized by phenomena originating from the emission of carbon dioxide and the subject of studies carried out by the National Research Council.