The Gotthard Tunnel runs between Erstfeld in the north and Bodio in the south, and connects rail traffic between Milan and Zurich. It's the world's longest and deepest, stretching 57 kilometres and delving 2 kilometres underground.
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Tunnel from Switzerland to ItalyThe Gotthard Tunnel is one of the connections that take vacationers from Switzerland to Italy.
Simplon Tunnel, railway tunnel from Iselle, Italy, to Brig, Switzerland, one of the longest railway tunnels in the world and one of history's great engineering feats. Running about 20 km (12.5 miles) long, it was the largest of the great Alpine tunnels when it opened to traffic in 1906.
LÆRDALSTUNNELEN - The world's longest road tunnel is 24,5 km long and situated between Aurland and Lærdal. The tunnel opened November 2000. Lighting is a central factor - every 6 km the area is widened and these rock chambers are fitted with special lighting. Safety equipment and monitoring are installed in the tunnel.