The Lötschberg Base Tunnel is a 34.577 km (21.5 mile) long new railway tunnel on the Bern-Lötschberg-Simplon railway cutting through the Alps of Switzerland some 400 m below the existing Lötschberg Tunnel. It is the longest land tunnel in the world, accommodating both passenger and freight trains, and running between Frutigen, Berne and Raron, Valais.
