From the North of Switzerland: Zurich, St. Gallen you drive in the direction of Chur. At Landquart, follow the street to Davos. At Klosters you can load your car on to the car train through the Vere-ina-tunnel or at summer times you can drive to Davos and over the Flüela Pass. After the tunnel or the Pass you follow the signs Scuol. When you come to the roundabout at Scuol, leave the round-about to the left and you will be at the Altana.
From Austria you cross Landeck in Tirol direction "Schweiz/St. Moritz". When you come to the roundabout at Scuol you turn to the right and the Altana is 200 meters ahead of you.
From Meran you drive over the Reschenpass or Passo di Résia. At Nauders you turn left towards Schweiz/Martina. At Martina you drive in the direction of St. Moritz and at the roundabout at Scuol you turn right.