Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Termas de São João das Caldas, in Óbidos, central Portugal, draws alkaline bicarbonate water (pH 8) at 38°C. Indoor pools, massage, and a sauna make up the facility.
Insider tip — Set in the rolling hills of central Portugal near Obidos, this traditional balneario has channeled local bicarbonate thermal springs for centuries. The waters are known for their digestive and musculoskeletal benefits, attracting local wellness seekers year-round. Combine your visit with a stroll through nearby medieval Obidos for a complete cultural immersion.