Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Aksaz Yeraltı Doğal Kaynar Hamamı in Ulubey, Uşak — literally "natural underground bubbling hammam" — taps bicarbonate water at 37°C, pH 8, offering a kessa scrub and marble-slab massage.
Insider tip — A remarkable underground natural hot spring (37°C) flowing from beneath massive granite rocks in the Aksaz/Hamamdere Valley, 57 km from Uşak. A Roman bath was constructed here thousands of years ago, excavated in 1994 and now protected as a Grade 1 Archaeological Site and Natural Conservation Area since 2020. Sodium-bicarbonate waters create extraordinary natural travertine pools.