The red trains by Rhaetian Railways (RhB) connects St. Moritz with Samedan and runs mainly on a north-south axis via the Albula Tunnel to the north and connects the Upper Engadine via Filisur and Thusis with Chur, the capital of the canton and consequently with the rest of Switzerland, and to the south via the Bernina Pass (, the highest traverse of a train in Europe) through the Val Bernina on its northern side and the Swiss but Italian spoken Val Poschiavo on its southern side with Tirano in Italy.