The highest mountain peak of the Bernina massif is Piz Bernina at 4'049 meters above sea level, and it is the only four-thousander in the Eastern Alps. The mountain range stretches from the Bernina Pass in the east to the Muretto Pass in the west. The Bernina massif features numerous glaciers. The builders of the Bernina railway line chose the route so that this impressive mountain world could be comfortably discovered from the train.