Bagni San Filippo photo spot

The hot springs of Bagni San Filippo are located on the eastern slope of the extinct volcano Monte Amiata at the periphery of Val d'Orcias rich forests. They are also not far from the western border of the Siena-Radicofani graben and the geothermal wells of the Mt. Amiata field. For thousands of years, in this area hot springs have built up several impressive travertine mounds of up to 30 m (100 feet) height. About 500 m (0.3 miles) west of the town center and at 100 m (330 feet) higher elevation as the nowadays active springs, there is the oldest known travertine deposit that has been dated at an age of 55,000 years. Since that time the main discharge level of thermal water has dropped to a height of presently 523 m (1,716 feet), whereas close to the oldest deposit only some reduced hot spring activity has remained.