The Rhätische Bahn (RhB) is the longest metre-gauge railway in Switzerland, linking Arosa, Disentis, Davos, St. Moritz in the high Alps, and Tirano in Italy with Chur, a rail junction with the SBB. It passes through the upper Rhine Valley and several side valleys, as well as the Engadine, the upper valley of the river Inn. The Bernina Pass is the highest point on this line, at 2253 m. Total length: 366 kilometres.