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, after the Furka Tunnel, the second highest alpine tunnel in Switzerland, and has a mountain overlay of up to 950 m (3,120 ft).