Hotel Am Triller’s new Salz & Wärme Spa is a small reservation-only day spa open through individually bookable spa packages. Its Finnish sauna is lined with Himalayan salt crystals and reaches 90°C; a daily Aufguss, rain showers, salt lounge and fireplace room complete the circuit. Public Good Morning Spa packages combine sauna and the hotel pool with breakfast for €59. Book ahead because entry is limited.