The Berghaus Diavolezza near Pontresiona will fill your tub, 3,000m above sea level with water straight from a mountain spring and then heat it to 41°C by means of a wood fire.

Popular tub times are around early evening when the sun sets and the stars begin to appear. Towels, bathrobes, bathing suits and trunks are available to rent if required at the Berghaus Diavolezza's reception desk.