Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Balneari Caldes d'Estrac, on the Catalan coast, draws on sodium-chloride water at around 37°C. Indoor pools, a sauna and massage services are on offer in this historic spa town in the Maresme area.
Insider tip — Caldes d'Estrac (Caldetes) on the Costa del Maresme is one of Catalonia's oldest thermal resort towns, with Roman-era hot springs at the base of the coastal hills above Barcelona. The Balneari Caldes d'Estrac has operated since the 19th century — a sea-view thermal establishment where sodium-chloride spring water at 37°C has drawn Mediterranean visitors since Roman legions first camped at its warm springs.