Albula Tunnel

The Albula Tunnel is the centrepiece of the Albula Railway, which forms part of the Rhaetian Railway network, in the Canton of Graubünden, Switzerland. With its maximum elevation of 1,820 m (5,970 ft) above sea level, it is amongst the highest tunnels in the Alps, and has a mountain overlay of up to 950 m (3,120 ft). The original tunnel has a length of 5,865 m (3.644 mi) and was opened for traffic in 1903. The northern portal of the tunnel is at Preda, in Bergün Filisur, and the southern portal at Spinas, in the Bever valley. At a total length of 5,865 m (3.644 mi), the tunnel connects the Albula Valley with the Engadin Valley, and, in so doing, passes under the watershed between the Rhine and the Danube a few kilometres west of the Albula Pass. The tunnel serves both passenger and freight traffic. The Glacier Express passes through it daily. During the winter season, car transporter trains operating between Thusis and Samedan also used the tunnel until 2011.