Inside the Gotthard Base Tunnel – world’s longest and deepest rail tunnel in Switzerland
Go inside the Gotthard Base Tunnel – world’s longest and deepest rail tunnel in Switzerland. The rail tunnel will be officially opened in Switzerland on 1 June 2016, after almost two decades of construction work. The Gotthard tunnel is 35 miles long, and is designed to provide a high-speed rail link under the Alps, linking northern and southern Europe.