Those who like hot-water frolics can head about 15km south of Bagno Vignoni along the SR2 to this tiny village, where there are thermal cascades in an open-air reserve. You'll find these just uphill from Hotel le Terme, the village's only hotel – follow a sign marked 'Fosso Bianco' down a path for about 150m to limestone outcrops and you'll come to a set of warm tumbling cascades that get more spectacular the further downhill you walk.