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Silica hot springs

389 silica-water places mapped worldwide. Find where to soak — and where to stay nearby.

Hotels in Japan →See the springs ↓

What is silica water?

Silica (SiO₂) is present in hydrated colloidal form. It forms a hydrophilic film on the surface that leaves the skin silky and soft to the touch.

The colloidal silica particles scatter blue light (Rayleigh effect), giving the water its unique milky color.

pH
Generally Alkaline (~8.0)
Family
Trace element
Element
Si · H₄SiO₄
Origin
Magmatic rocks & Geothermal fields
Best for
Skin softness & cosmetic care
Temperature
Very hot (>80°C at the source)

What it feels like

Silica forms a hydrophilic film on the skin, the source of the silky sensation and the characteristic milky color.

Sensations & traditions

Did you know — The white deposit at the bottom of the Blue Lagoon is pure silica, used for facial masks.
Good to know — Deep open wounds (depending on concentration).

Wellness and cultural information — no therapeutic claims. If in doubt, ask a healthcare professional.

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389 silica springs to explore

Frequently asked questions

What is silica water?
Silica (SiO₂) is present in hydrated colloidal form. It forms a hydrophilic film on the surface that leaves the skin silky and soft to the touch. The colloidal silica particles scatter blue light (Rayleigh effect), giving the water its unique milky color.
What does a silica-water bath feel like?
Silky touch on the skin. Gentle softening effect. Iconic milky waters (Blue Lagoon style).
Where can I find silica hot springs?
Thermae lists 389 silica-water places worldwide, including Blue Lagoon (Iceland), La Bourboule (France), Wai-O-Tapu (New Zealand). Explore the map to filter them by country and destination.
Are there any precautions with silica water?
Deep open wounds (depending on concentration). Wellness and cultural information — no therapeutic claims. If in doubt, ask a healthcare professional.

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Japan 4666Turkey 959United States 565China 464France 442Italy 422Germany 383Spain 352Hungary 161Indonesia 147Mexico 134Chile 130Greece 119India 119Peru 116Taiwan 100Austria 97Brazil 96South Korea 95Iceland 93Portugal 91Thailand 85Romania 80Switzerland 74