The Gotthard Rail Tunnel, is a 15-kilometre (9 mi) long railway tunnel

Tunnel

A tunnel is an underground passageway, completely enclosed except for openings for egress, commonly at each end.A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. Some tunnels are aqueducts to supply water for consumption or for hydroelectric stations or are sewers...

 and forms the summit of the Gotthard Railway

Gotthardbahn

Gotthardbahn was the name of a private Swiss railway company which operated the railway line from Immensee to Chiasso . Nowadays this term usually does not refer to that company, but to the railway line itself...

 in Switzerland. It connects Göschenen

Göschenen

Göschenen a village in the canton of Uri in Switzerland.-History:Göschenen is first mentioned in 1280 as Geschenden. In 1290 it was mentioned as Gescheldun, then in 1294 as Geschenen and in 1429 as ze Gestinen.-Geography:...

 with Airolo

Airolo

Airolo is a municipality in the district of Leventina in the canton of Ticino in Switzerland.-History:In the settlement of Madrano, Roman tombs from the 2nd and 3rd Centuries AD were found. They belonged to a Vicus, whose inhabitants probably collected crystal, which was processed in Locarno into...

 and was the first tunnel through the Gotthard massif

St. Gotthard Pass

The Gotthard Pass or St. Gotthard Pass is a high mountain pass in Switzerland between Airolo in the canton of Ticino, and Göschenen in the canton of Uri, connecting the northern German-speaking part of Switzerland with the Italian-speaking part, along the route onwards to Milan.Though the pass...

. It is built as one double-track, standard gauge tunnel.

The tunnel rises from the northern portal at Göschenen (1106 metres / 3650 ft) and the highest point (1151 metres, or 3800 ft) is reached after approximately 8 kilometres (5 mi).