Switzerland. Canton Ticino. Airolo. Train into tunnel. Entrance of the Gotthard railway tunnel. North-south traffic by rail. Leventina valley. A swiss flag and a peasant with his tractor on field. The Gotthard Tunnel (German: Gotthardtunnel, Italian: Galleria del San Gottardo) is a 15.003 km (9.322 mi) long railway tunnel and forms the summit of the Gotthard Railway in Switzerland. It connects Göschenen with Airolo and was the first tunnel through the Gotthard massif. It is built as one double-track, standard gauge tunnel. Services are operated by the Swiss Federal Railways. 01.04.08 © 2008 Didier Ruef