how to get there and useful info

To reach Gambassi Terme from Florence, take the SGC Firenze-Siena – which begins at the Firenze Impruneta exit of the Autostrada A1 highway – toward Siena.
After approximately 30 kilometres, exit at Poggibonsi Nord and continue toward Certaldo, where you will begin to find directions for Gambassi Terme.

Otherwise, from Florence or Pisa, it is possible to take the SGC Firenze-Pisa-Livorno: take the Empoli Ovest exit, get on the S.S. n. 429 until Castelfiorentino, where you will find the S.P. n. 4 until Gambassi Terme.