At the center of the village is the “square of the springs”, a rectangular basin, of sixteenth-century origin, which contains a source of hot and steaming thermal water that comes out of the underground layer of volcanic origins. Since the time of the Etruscans and then the Romans – as evidenced by the numerous archaeological finds – the baths of Bagno Vignoni have been frequented by illustrious personalities, such as Pope Pius II, Catherine of Siena, Lorenzo de ‘Medici and many artists who had elected the village as a holiday resort. The waters that come out of the thermal bath go towards the steep escarpment of the Natural Park of the Mills; there are four medieval mills dug into the rock which were important for the local economy as the perennial thermal spring ensured their operation even in summer, when the other mills in the area were stopped due to dry rivers
