Ok,
Someone will hate me for this post ... First part of free natural spa.
Italy is rich in thermal springs, some little known to the rest of you. :)
My favorite, and those that know best:
Bagni di Petriolo. Here on maps
These spas are located between siena and grosseto. In the center of Tuscany
They are located between siena and grosseto. VIRTUALLY IMPOSSIBLE TO GET THERE BY PUBLIC TRANSPORT. Car or bike, but there are really difficult climbs, but nice downhill.
Tips and tricks:
1. bathroom at night, or in the winter season. must-do.
2. The place is always busy.
2. You can not camp, but you can ... You can not light fires, but you can .... Beware ..
3. If you are not so wild, continuing on the road you can find a B & B
4. Keep clean and respects everyone and everything.
5. Dogs are generally quite accepted, but keep an eye on.
The images speak for themselves ..
Water at 43 degree..