Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SoufreSodiumChlorureSulfateCalcium
In Dax, in the Landes region of southwest France, the thermal tradition dates back to Gallo-Roman antiquity, when the town was known as Aquae Tarbellicae. Water rises naturally at 64°C from several boreholes along the banks of the Adour river, rich in calcium and sulfates. What sets Dax apart is its péloïde, a thermal mud born from the meeting of hot spring water and ancient river silt, where blue micro-algae develop.
Insider tip — Dax is France's most visited thermal resort, and its signature ingredient is 'peloid' — a mud matured in thermal water and Adour river silt, unique to the region. Start your visit at the Nèhe hot spring fountain in the town centre, where water flows freely at 64 °C — a striking free attraction that captures the essence of Dax's thermal identity.