Between Siena and Grosseto, right on the border of the territories of Monticiano and Civitella Paganico, within the Basso Merse Nature Reserve, stand the Petriolo Thermal Baths. Already known and appreciated since Roman times for their healing properties, they were formerly located on the banks of the Farma stream.

The thermal baths also appreciated by Pope Pius II Piccolomini, are indicated above all for those who suffer from the respiratory tract and who have benefits for the strong presence of hydrogen. sulphide. The thermal baths in which you can do free of charge all year round, are made up of deposits of sulfur and limestone and are immersed in the waters of the stream and from where it comes out. water at a temperature of 42 degrees that makes attendance pleasant even during the winter months due to the hot steam that mixes with the cold air and thus creating a optimum temperature.

The spas experienced ups and downs until they found their appreciated identity even if outside the classic canons specifically dedicated to this type of tourism. The enhancement that all Italian spas have been carrying out for some years has made this niche of tourism specialized in body care rediscover. Their thermal water is taken from tubes that reach up to 300 meters deep and send it to the small rock pools. Particularity is the richness of calcium carbonate and magnesium that leave abundant deposits.

Among the microelements are bromine and iodine but above all the arsenic that is particularly indicated in the dermatological and dermocosmetology field. Among the various therapeutic indications are skin diseases (acne, psoriasis, eczema), the musculoskeletal system (chronic artopathies and osteoarticular diseases) and those related to the pathways respiratory (pharyngitis, sinusitis, rhinitis). A modern establishment open every day and located in Petriolo-Monticiano, welcomes guests who can take advantage of swimming pools with thermal water also mud therapy treatments, nasal showers, inhalation treatments and aerosols, all within a habitat consisting of a decidedly uncontaminated and relaxing nature. In the center you can use a dedicated Wellness Center for the beauty of the face and body.

Tourists who will be guests of the Thermal Baths can vary their stay with excursions dedicated to discovering the nearby medieval villages where they can dive into ancient atmospheres such as the Belagaio Castle located northeast of Roccastrada, inside the Farma Nature Reserve. The appearance of the castle is that of a fortified complex, formed by the manor residence with a quadrangular plan and a tower with battlements. Also from the same period near the castle is the Chapel of San Leonardo, another gem to visit. But you can also find other springs, near the thermal baths.

Along the Farma, about 800 meters from the thermal baths, there is a characteristic travertine formation resembling a large white mushroom on top of which a small source rich in calcium carbonate, which increases and gradually transforms its shape.

The Spring of Guinazione -reachable from the village through a dirt road- stands about 240 meters above sea level at Lama Iesa. The spring has a ferrous water that comes out at 27°C. To get to the Terme di Petriolo by train: Grosseto-Siena line, Civitella Paganico station. By car: Autostrada del Sole - Firenze Certosa exit - Take the Florence-Siena - In Siena take the SS 223 for Grosseto to the Farma Viaduct. For those coming from the south take the Rome-Civitavecchia-Grosseto - Exit Grosseto - SS for Siena - Exit at Km 42.