ADLER Spa Resort Thermae is the Val d’Orcia seen from a warm pool. A South Tyrolean hotel family built it in a former travertine quarry on the edge of Bagno Vignoni, the tiny spa village whose medieval square is itself a steaming pool, and the resort pipes the same hot spring water into its own indoor and outdoor pools. Around it lie the cypress roads, Pienza, Montalcino and Montepulciano. My one-line verdict: arguably the most complete thermal spa resort in southern Tuscany, provided you want a full-service wellness hotel with half board rather than a quiet wine estate.
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Quick facts: ADLER Spa Resort Thermae
- Location: Strada di Bagno Vignoni 1, on the edge of Bagno Vignoni, municipality of San Quirico d’Orcia, province of Siena.
- Rooms and suites: around 90 (the Falstaff guide lists 79 rooms and 11 suites; one booking platform lists 87), all with a terrace or balcony.
- Price level: high, with half board included in most rates.
- Season: not open year-round. In 2026 the resort closed from 6 January and reopened on 5 February. Ask the hotel for the 2027 winter break.
- Nearest airport: Florence, roughly two hours by car. Rome Fiumicino is around two and a half to three hours.
- Best for: spa lovers and couples who want thermal water every day and the Val d’Orcia on the doorstep. Families: see our note on the child policy below.
Check prices and availability
Valley-facing rooms with a terrace sell first in spring and autumn, the best months for walking and wine. Compare dates before you commit.
Location and getting there
Bagno Vignoni is a hamlet of San Quirico d’Orcia, set on a travertine ridge above the Orcia river. Its central square is a large rectangular pool of spring water that has drawn bathers since Roman and medieval times; you can look but not swim. The resort sits just below the village, low and curved into the slope of an old quarry, so the buildings feel more like terraces than a block.
The setting is the reason to come. You are in the middle of the UNESCO-listed Val d’Orcia: San Quirico is a few minutes away, Pienza and Montalcino are each roughly 20 to 30 minutes by car, and Montepulciano a little further. Our Val d’Orcia road trip strings these towns together into a few easy driving days.
Florence airport is the closest major gateway at roughly two hours by car, while Rome Fiumicino takes around two and a half to three hours depending on traffic. The hotel arranges airport transfers on request for a fee; one booking platform lists the shuttle at 190 euros per person, so ask the hotel for current prices. Buonconvento is the nearest railway station, about 25 minutes away. A hire car makes everything simpler here, and our Italy travel planner covers car hire and transfers.
Rooms and suites
ADLER describes its accommodation as light-flooded rooms and suites, and the published count sits at around 90. The Falstaff guide lists 79 rooms and 11 suites, while one booking platform gives 87 rooms, so if the exact number matters to you, ask the hotel. Every unit has its own terrace or balcony, which is the thing to focus on when you book: the outlook decides how the room feels.
- Superior rooms: around 35 m², for one or two guests, with a terrace or balcony, walk-in rain shower and a tea and coffee station.
- Valley view rooms: the same comfort with the open view across the Val d’Orcia. Worth the supplement in my opinion.
- Family suites: two separate bedrooms for two to five guests (one booking platform lists around 50 m²), with a terrace or balcony.
- Suites: a smaller number of larger units. Details and sizes vary, so ask the hotel which suites face the valley.
The style is ADLER’s signature: warm natural materials, travertine, wood and earth tones, rather than Tuscan antiques. If you want frescoes and four-poster beds, look at a castle hotel instead.
Dining
Most rates include half board, and the kitchen is led by chef Gaetano Vaccaro, who has been at the resort since it opened in 2005. The cooking is Tuscan and Mediterranean, built on regional and organic products from small producers. Dinner offers meat, fish and vegetarian choices, with vegan dishes on request, and bread and baked goods are made in house with organic flours from the Val d’Orcia.
- Main restaurant: breakfast and the evening dinner, with an open-air terrace used in warm weather.
- Osteria: a more relaxed space, used for lunch.
- Piano bar: pre-dinner cocktails and afternoon tea.
- Wine: the resort reports a team of 21 qualified sommeliers, and the list leans heavily on Brunello di Montalcino and Vino Nobile di Montepulciano, plus the family’s own Orcia wines.
An honest note on Michelin: I could not find a Michelin star or other Michelin listing for the resort’s restaurant in the 2026 guide. This is high quality half board, not a destination tasting menu. For a starred evening, our Rosewood Castiglion del Bosco review and Castello Banfi Il Borgo review cover two of the most serious tables around Montalcino. Tell the hotel in advance if you will dine out, so they can adjust your board.
Check rates at ADLER Spa Resort Thermae
Spa and pools
Water is the whole point. The spring of Bagno Vignoni rises at around 50°C, and the resort cools it to about 36°C for its thermal pools, which stay open outdoors all year.
- Thermal pools: connected indoor and outdoor thermal pools at about 36°C, with a round pool featuring a “Wild River” current.
- Lap pool: a separate, cooler pool for actual swimming, a useful counterpoint to the warm water.
- Children’s pool: also thermal, at around 36°C.
- Grotta Salina: an underground salt grotto with a pool of Dead Sea salt water, where you float in near silence.
- Saunas and steam: the resort lists five sauna experiences, including a panoramic Finnish sauna, a bio sauna by the small lake in the old quarry, an herbal steam bath, an Etruscan salt steam bath and a travertine cave steam room. There is a separate ladies’ sauna.
- Argillae: a clay bath ritual.
- Treatments: around 20 treatment rooms, with ADLER’s own treatments, Ayurvedic rituals and a “Brunello” wine ritual.
- ADLER MED: doctors and specialists for preventive and regenerative medicine, with longevity programmes, tests such as heart rate variability and an on-site laboratory.
The afternoons are the busiest time in the pools. If you want the thermal water to yourself, go before breakfast or after dinner, and book treatments before you travel in spring and autumn.
Sport and activities
This is not a sports resort in the tennis or golf sense. I could not verify tennis courts or padel on site, and there is no golf course, so ask the hotel if racquet sports matter to you. For golf, see our guide to golf hotels in Tuscany. What ADLER does very well is the gentler, outdoor side.
Walking and cycling
The resort helped develop a network of around 450 km of walking and cycling trails in the Val d’Orcia with local municipalities, available through the “Val d’Orcia Outdoor” app or a paper map at reception. Guided walks run several times a week. E-bikes can be hired, and the resort sells cycling packages with guided bike tours; in 2026 these run on set weekdays and are not suitable for children under 15.
Fitness and movement
There is a gym plus yoga, Pilates and sound bath sessions. Horse riding, truffle hunting in season, cooking classes and vintage car or scooter hire can be arranged on request.
Wine
The Sanoner family also owns Tenuta Sanoner, an organic and biodynamic wine estate with around 12 hectares of vines, about a ten-minute walk from the resort. Guests can visit for cellar tours and tastings of its Orcia DOC wines. From there, Montalcino for Brunello and Montepulciano for Vino Nobile are both easy day trips. Our Montalcino guide explains which cellars to book, and ADLER also appears in our roundup of wine hotels in Montalcino and the Val d’Orcia.
What’s nearby
- Bagno Vignoni: the medieval pool square and the old mill channels cascading down the travertine. A five-minute stroll for a sunset aperitivo.
- San Quirico d’Orcia: the Horti Leonini garden and a quiet main street, a few minutes away.
- Pienza: the Renaissance “ideal town” and its pecorino shops, with the famous chapel of Vitaleta nearby.
- Montalcino and Sant’Antimo: Brunello cellars and the Romanesque abbey below the town.
- Montepulciano: hilltop wine town with underground cellars. Read our Montepulciano guide.
ADLER Thermae vs other Val d’Orcia luxury hotels
| Hotel | Location | Standout | Best for |
|---|---|---|---|
| ADLER Spa Resort Thermae | Bagno Vignoni | Thermal pools at 36°C, salt grotto, half board, family winery nearby | Wellness first, couples |
| Castello di Velona | Near Castelnuovo dell’Abate | Castle, thermal pools, own Brunello | Wine and spa in a historic setting |
| Rosewood Castiglion del Bosco | North-west of Montalcino | Own Brunello, two Michelin stars, private golf course | Gourmets, golfers, the full estate |
| Castello Banfi Il Borgo | South of Montalcino | 14 rooms beside a famous winery, Michelin-starred dinner | Couples who want a small wine hotel |
In short: ADLER is the choice when the thermal water is the holiday. Velona is its closest rival for warm pools, with a castle and its own Brunello instead of scale and kids’ facilities (read our Castello di Velona review). Castiglion del Bosco and Banfi win on fine dining and wine estate atmosphere.
Who it suits, and who it does not
It suits:
- Spa lovers who want hot spring water every day, in winter as much as in summer.
- Couples who like the simplicity of half board after a day of walks or tastings.
- Families, as long as the hotel confirms the child policy for your dates: a kids club, childcare and a thermal children’s pool are advertised.
- Walkers and cyclists who want marked routes from the door and guided outings.
- Guests interested in preventive medicine and longevity programmes.
It does not suit:
- Travellers who want a small, historic boutique hotel: with around 90 rooms, this is a resort.
- Food lovers who need a Michelin-starred restaurant in-house.
- Tennis players and golfers looking for facilities on site.
Charlotte’s tip: go when it is cold
The best time here is late February or November: crisp air, mist in the valley, and 36°C water outdoors. Book a valley-view room, swim before breakfast when the pools are empty, then walk up to Bagno Vignoni’s square at dusk. In summer, the same pools feel more like a warm bath than a treat.
Practical tips
- Booking: reserve treatments, ADLER MED appointments and Tenuta Sanoner tastings when you book the room, especially for spring and autumn.
- Best rooms to request: any category with a valley view. Rooms facing the inner resort are quieter in outlook but less special.
- Season: the resort takes a winter break around January. In 2026 it reopened on 5 February. Confirm 2027 dates with the hotel.
- Dress: relaxed by day, smart casual for dinner.
- Kids: our research turned up contradictory information here. The resort advertises a kids club, childcare, family suites and a children’s pool, while one German spa portal lists it as adults-only. It was not clear to us whether any adults-only periods or zones apply, so confirm with the hotel before you book.
- Know the name: booking sites list the resort as both “ADLER Spa Resort Thermae” and “ADLER Thermae”. It is the same hotel. The family runs further ADLER resorts in the Dolomites, so check you are booking Bagno Vignoni.
Check prices and availability
Compare room categories, from the Superior rooms to the family suites, and check which dates include half board and spa access.
Frequently Asked Questions
Can you swim in the thermal water at ADLER Thermae?
Yes. The resort uses water from the Bagno Vignoni spring, which rises at around 50°C and is cooled to about 36°C for its indoor and outdoor thermal pools, open all year.
Is ADLER Spa Resort Thermae open all year?
No. It closes for a winter break around January. In 2026 it was closed from 6 January to 4 February. Ask the hotel for 2027 dates.
Does ADLER Thermae have its own winery?
The owning Sanoner family runs Tenuta Sanoner, an organic and biodynamic estate about ten minutes’ walk away, with tastings and cellar visits for guests.
Is ADLER Thermae good for children?
Our research was not conclusive. The resort advertises a kids club, childcare, family suites and a thermal children’s pool, but one portal lists the hotel as adults-only, so confirm the current child policy with the hotel.
