Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Piscina Termale — 'Thermal Pool' — is a natural or developed sulphurous spring pool in Italy offering outdoor thermal bathing in the rich Italian tradition of terme libere and terme sviluppate (developed thermal pools). Italy's extraordinary concentration of natural volcanic and Apennine thermal springs has given rise to a national culture of thermal bathing that ranges from grand licensed establishments with medical programmes to simple natural pools in agricultural landscapes. Whether in the volcanic Maremma, the sulphurous springs of the Viterbo area, or the mountain springs of the Apennines, the Italian thermal pool is a deeply embedded feature of the country's relationship with its geological heritage.
Insider tip — Piscina Termale near Castel San Pietro is part of a small thermal circuit in the eastern Bolognese Apennine foothills, where sulfurous waters have been prized since the 19th century. The 38°C pool waters contain sulfate and bicarbonate minerals drawn from Miocene clays beneath the Po plain margin. Castel San Pietro's spa tradition rivals that of larger Emilian resort towns and remains popular with local Bolognese seeking weekend wellness escapes.