Tuscany is the largest region in Italy attracting more than ten million visitors annually! It's no surprise—the region has plenty of beautiful sites such as the enchanting capital of Florence, the vineyards of Chianti, the Uffizi art gallery, and amazing natural hot springs.
Fosso Bianco is a tiny natural hot spring with high levels of calcium and sulphur. It is located in Bagni San Filippo in the Orcia valley. To get there, you need to overcome a muddy path through the village. Once there, don't be surprised by the warning signs like "Danger; No climbing; No bathing". These were set up by the council of Castiglione d’Orcia in case the calcium rocks ever started to fall apart. The signs do scare visitors, making the place calm and deserted.
Fosso Bianco is definitely worth the visit. For those who love modern facilities, there're several privately owned spa & hotels in Bagni San Filippo operating from May to October. But speaking of Fosso Bianco, the best time to visit is from November to April,—when spa centres are closed, the wild pools receive more waters. Besides, there're no crowds, so you will have an excellent opportunity to enjoy the silence and be in close contact with nature.