Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Thermes de Thonon are a distinctive thermal establishment in Thonon-les-Bains, the largest French town on the southern shore of Lake Geneva (Lac Léman) in the Haute-Savoie department, with panoramic views across the lake toward the Swiss city of Lausanne and the Vaud Alps beyond. The bicarbonate mineral waters, which spring from the geological formations beneath the lake's southern shore, are particularly valued for their therapeutic effects on renal and urological conditions, and have been used medically since ancient times in a setting of exceptional natural beauty on the shores of Europe's largest freshwater lake. The surrounding Lake Geneva waterfront, the Ripaille Château with its medieval tower and Renaissance gardens, and the Savoyard mountain backdrop of the Chablais Alps give Thonon-les-Bains one of the most scenically magnificent settings of any French thermal town.
Insider tip — Thermes de Thonon sits above the southern shore of Lake Geneva, where cold bicarbonate springs are gently heated to 35°C for specialist wellness sessions. The lakefront promenade below offers sweeping views of the Swiss Alps, including the iconic silhouette of the Dents du Midi. Thonon is easily reached by a scenic train line from Geneva, making it a popular day excursion for Swiss visitors. The old town's fountain squares and Belle Époque villas reward a stroll between sessions.