From the main square of Pitigliano, along Via Cava (no motorized vehicles are permitted), you follow an extraordinary itinerary carved into the volcanic rock, until the famous city of Sovana, an Etruscan necropolis. Then you cross Cavoni and wade across the Fiora to reach San Martino sul Fiora. Continue toward Poggio Morella and turn off for the warm, sulphurous, terraced waterfall that feeds the Stellata stream: a swim in this water is a double treat. On the return, go through Manciano. A guide is advisable.