Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
The vasca termale of Fordongianus, in Sardinia, is an open-air pool of sulfurous water reaching 38°C, set along the Tirso river on a site of Roman origin. Bathing here remains simple, in a natural and historic setting.
Insider tip — This unnamed vasca termale near Fordongianus taps the same volcanic hydrothermal system that fed the Roman baths two millennia ago, delivering sulfurous water at a consistent 38°C. The pool sits on the bank of the Tirso River amid wild oleander thickets, with red trachyte cliffs rising on the opposite bank. The lack of commercial infrastructure keeps the atmosphere entirely authentic and the local visitor majority Sardinian. Afternoons in spring, when the oleanders flower, transform the gorge into a riot of pink blossom and steam.