4. Yulhyeon Tunnel, South Korea - 50.3 km The Yulhyeon Tunnel in South Korea is the fourth longest railway tunnel in the world, at 50.3 km. This tunnel is part of the Gyeongbu high-speed rail line ...

The longest railway tunnels in the world will change ... the Songshan Lake Tunnel at the end of 2017. 4. Yulhyeon Tunnel, South Korea: 50.3km The Yulhyeon Tunnel is a 50.3km railway tunnel in ...

Did you know that the Gotthard Base Tunnel in Switzerland, the longest rail tunnel in the world, runs deeper than any other tunnel, reaching up to 2.3 kilometres (1.4 miles) below the surface?

The Gotthard Base Tunnel currently holds the world record for being the world's longest and deepest railway tunnel, spanning the 35.5-mile distance between the cantons of Uri and Ticino.

Seikan Tunnel stretches 53.9 km and stands as Japan's longest tunnel. It is located beneath the Tsugaru Strait and connects the islands of Honshu and Hokkaido ...