The place is characterized by the striking limestone deposits formed by hot sulphurous thermal waters. Since the Middle Ages, the area has hosted countless famous people in history, including Lorenzo the Magnificent. The Terme San Filippo, just 60 km from Siena, combines a hotel, restaurant, wellness area and spa pool in a single complex. Here, especially at sunset, the Bagno Vignoni is a must-see attraction. Located in the center of the village in the "Square of the springs," this rectangular, sixteenth-century pool contains a thermal water source (hot and steaming) that flows from the underground volcanic aquifer.