Gotthard Base Tunnel

It's being described as Switzerland's construction of the century – the new Gotthard Base Tunnel, at 57 kilometres the longest rail tunnel in the world. Opened in December 2016, the tunnel links Erstfeld in German-speaking Central Switzerland with Bodio in Italian speaking Canton Ticino. Trains are able to travel at up to 250 kilometres per hour, cutting north-south travel time considerably. The tunnel (construction started in 1996) is also one of the largest nature protection projects in Europe.