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World's longest tunnel hidden beneath the Earth is 35 miles long and changing train travel foreverDespite being the longest train tunnel in the world, alternatives like the Seikan Tunnel in Japan's Tsugaru Strait and the Channel Tunnel connecting the UK and France offer quicker routes.
A separate system grouts the pieces together. With its official opening, the GBT has surpassed Japan's 53.9-kilometre Seikan tunnel as the world's longest train tunnel. The 50.5-kilometre Channel ...
The Hokkaido Shinkansen, which provides a direct rail link between Tokyo and the northernmost of Japan's four main islands via the undersea Seikan Tunnel, opened on March 26, 2016.
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