Bagni San Filippo (Fosso Bianco)
free hot springs in nature
Photo sources
- Francesco Bini (opens in a new tab), CC BY-SA 4.0 (opens in a new tab) · Wikimedia Commons · changed (cropped and resized)
About
Bagni San Filippo is a small village in southern Tuscany between Val d'Orcia and Monte Amiata. The main draw is the freely accessible Fosso Bianco hot springs, where water emerges at about 48 to 52 °C and cools as it flows down the stream.
The lower area has no facilities: the bathing pools formed naturally and visitors shape them with stones and branches. A forest path leads to the white limestone formation Balena Bianca. The paid Terme San Filippo pool is closed for renovation, according to the website.
- Free thermal springs at Fosso Bianco, no entrance fee, open all year
- Balena Bianca limestone waterfall about 10 minutes' walk from the first pools
- Water at 48–52 °C near the source, pleasantly warm lower down
- Natural thermal mud
- Dogs allowed on a leash, outside the water
Opening hours
| Mon–Sun | non-stop |
|---|
According to the website the springs are open day and night all year. The Terme San Filippo pool is closed for renovation.
Prices
| Access to the free springs | free |
|---|---|
| Parking at the village entrance | 1,50 € / hour |
The car park on Via Fosso Bianco is paid (meter, card or coins) and fills quickly on high-season weekends.
Amenities
What is here and what is not. Not everyone wants saunas and pools, not everyone a swimwear-free sauna.
- Thermal wateryes
- Outdoor pool or tubyes
What is not listed here is unknown to us or the operator has not said.
Pros and cons
Pros
- Free entry and open round the clock
- Natural cascades and a white limestone waterfall
- Natural mud formed from the minerals
- A short forest walk to the Balena Bianca waterfall
Things to keep in mind
- No facilities, changing rooms or supervision
- Ground by the pools is uneven and slippery
- Parking is paid and full in season
- The mineral water can stain clothes
Who it suits and how it works
Who it suits
- a nature outing
- landscape photography
- a couple for a winter soak
Rules and good to know
- Do not climb on the limestone formations
- Dogs are allowed on a leash but not in the pools
- Bring swimwear, a towel, spare clothes and sturdy shoes
- Watch children near the water and the fragile formations
Getting there
The village is about 2 km off the SS2 Cassia road near km 162, roughly an hour (60 km) from Siena. From Rome it is about 180 km via the A1 (Chiusi–Chianciano Terme exit), from Florence about 150 km. The website recommends a car.
By train go to Chiusi–Chianciano Terme and then take the FT9 bus, changing at Sarteano or Piancastagnaio; the trip takes about 2 hours and the bus runs roughly four times a week.
Contact
- Address
- Via Fosso Bianco, 53023 Bagni San Filippo (SI)
Details from the operator's own site, as of 1 Nov 2026. Check them with the operator before you go: bagnisanfilippoterme.it
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