Val d’Illiez Thermal Baths Spa ComplexA 200-m river is filled with the 30°C natural spring water at the Val d’Illiez Thermal Baths Spa Complex.Home » Valais / Wallis » Aigle » Hot Spring Baths in Val d’Illiez in the Alps near Lac Léman in Switzerland (Closed) » Val d’Illiez Thermal Baths Spa Complex