We had the opportunity to be in the Terme di Saturnia Hotel for a complimentary three-days stay, in a junior suite, bed and breakfast.
The hotel is a very nice and big structure, with a golf course (there are still some work in progress...), tennis courses, and, of course, the thermal pools.
The main pool, with a rocky bottom, is really deep, and the water is more than warm (37 degrees celsius).
Starting from the lobby, you can smell sulphur (hey it's a real spa, after all), and this smell is just about everywhere.
There are also complimentary jacuzzis (with thermal water, of course), and smal waterfalls, together with shallower pools.
When you don't feel like bathing, you can relax by the pool, have a drink (not so expensive).
Breakfast is very good (you have also low-cal options), and the two restaurants (one poolside, but U have to consider the smell...) serve good (if not excellent) food for a reasonable price.
Our room (a junior suite) was very spacious, with marble everywhere.
Service was good and professional, and you have a great variety of treatments to choose from (they don't come cheap, though).
All in all, a great experience, if you want to relax, in marvellous Maremma (don't miss to visit the nearby Montemerano, Sovana and Pitigliano, and go wine tasting in Scansano, for a great Morellino)
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC