Longest train tunnel in the world buried thousands of feet below ground cost £11.2billion to build

The Gotthard Base Tunnel - a railway tunnel below the Lepontine Alps in Switzerland - is the longest and deepest transport tunnel in the world. It opened in June 2016 and has provided a high-speed ...

Asia’s longest railway tunnel hides 50 kilometres of a South Korean bullet-train line underground: Passengers race through the darkness at 300 kilometres an hour, seeing nothing

Passengers boarding South Korea’s SRT high-speed trains from Seoul often settle into their seats expecting changing city skylines and mountain scenery. Instead, for much of the trip, the windows show ...

World's longest railway tunnel cost £11.2bn to build and is thousands of feet below ground

This tunnel is the longest and deepest transport tunnel in the world at 57km, and it has been in operation for 10 years this month ...
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The world's largest underwater tunnel is barely being used today

Around the world, there are some truly iconic tunnels. From the engineering marvel of the popular Channel Tunnel linking the UK and France to the world's longest and deepest tunnel, the Gotthard ...