Plinius Naturalis historia 31.4
Pliny the Elder indicates the importance of mineral and thermal springs were for humans, and how in some occassions, these springs caused the creation of some urbes because the value of these waters for health. In this case, he includes the examples of some of those cities: Puteolos (Puteoli, Italy), (Aquae) Statiellas (Acqui Terme, Italy) and (Aquae) Sextias (Aix-en-Provence, in France)