The thermal springs at Pre-Saint-Didier have been known since the 16th century, when the Savoy aristocracy discovered that hot water bubbles from the rock at 37°C in a valley at the foot of the most massive mountain in Western Europe. The modern spa (renovated 2000) is dramatically sited: outdoor thermal pools cascade down a hillside with Mont Blanc's 4,808-meter summit directly in your line of sight. In winter, you float in hot mineral water while snowflakes land on your face and the mountain turns pink at sunset. In summer, the midnight sessions let you soak under stars in a valley that doesn't get fully dark until 10:30pm. The waterfall relaxation area — where thermal water falls on your shoulders from a rock ledge — is among the most memorable spa experiences in the Alps. Valle d'Aosta guide → · Courmayeur →
Plan my Mont Blanc trip →Outdoor pools (3): Cascading thermal pools at different temperatures (33-37°C), connected by warm-water channels. The main pool faces Mont Blanc directly. The infinity-edge upper pool gives the illusion of swimming into the mountain. Indoor pools: Relaxation pools, hydromassage, and a Roman-style thermal circuit. Saunas (5+): Finnish sauna, steam bath, aromatherapy rooms, and an outdoor sauna with mountain views through floor-to-ceiling glass. The waterfall: Natural thermal water cascading from rocks onto relaxation loungers — the sound and sensation is hypnotic. Relaxation rooms: Heated stone beds, salt rooms, hay rooms (South Tyrolean tradition — warm hay wraps). Night sessions (Fri-Sat): Open until midnight — the experience of soaking under stars with Mont Blanc illuminated by moonlight is worth the trip alone.
Address: Allée des Thermes, Pre-Saint-Didier (3km from Courmayeur). Tickets: 2h €46, 3h €55, full day €65. Night sessions €55. Hours: daily 10am-9pm (Fri-Sat until midnight). Book online: termedipre.it — weekends and holidays sell out. Getting there: Pre-Saint-Didier is 5min from Courmayeur by car or bus. From Turin: 1.5h via A5 autostrada through the Mont Blanc tunnel approach. From Milan: 2.5h. Stay: Courmayeur (€90-200/night — ski resort atmosphere), Pre-Saint-Didier village (€70-130). Combine with: Courmayeur (5min), Mont Blanc Skyway cable car (Punta Helbronner, 3,466m — panoramic terrace), Gran Paradiso (1h), Aosta Roman ruins (35min).