Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Piscinas Aguas Termales, in Coamo, Puerto Rico, combines thermal and bicarbonate water, pH 8. The site features an open-air pool for wild bathing, a longstanding local gathering spot on the island.
Insider tip — The thermal springs of Coamo (Puerto Rico) have been known since Taíno and Spanish colonial times as the 'waters of youth' — a tradition that has endured across the centuries. The thermal pools (38-42°C) with sodium-bicarbonate waters are accessible via the Parador Baños de Coamo, 2 hours from San Juan.