The Seelisbergtunnel is a tunnel in Switzerland with a length of over 9,200 meters. It is part of the A2 motorway (also known as the Gotthard motorway), which runs from the German border near Basel through Switzerland to the Italian border near Chiasso, making it a crucial route for north-south traffic in Europe. Contrary to its name, the Seelisbergtunnel is not named after the mountain through which it passes but after the town of Seelisberg, which is adjacent to the tunnel. The mountain through which the Seelisbergtunnel passes is the Niederbauen Kulm in the Urner Alps, which has an elevation of 1,923 meters and borders Lake Lucerne. The Seelisbergtunnel runs through the mountain along Lake Lucerne from Lucerne to Altdorf and was opened to the public in December 1980. Before 1980, ferries were commonly used to cover the north-south route, and now over 20,000 vehicles pass through the Seelisbergtunnel daily.
Lake Lucerne (Vierwaldstättersee)
Lake Lucerne, also known as Vierwaldstättersee, covers an area of 114 km² and is located in the 4 cantons (formerly Waldstätten) of Uri, Schwyz, Unterwalden, and Lucerne (hence the name). It is the fifth-largest lake in Switzerland and is situated in the central part of Switzerland, south of Zurich. The major towns located on the shores of Lake Lucerne include Lucerne, Küssnacht, Horw, and Brunnen. The lake is divided into several basins and bays: the Urnersee in the east, the Gersauer See in the middle, and the Chrüztrichter in the west. The Seelisbergtunnel passes through the lakeside area from the Gersauer See to the Urnersee.