Gotthard Base Tunnel video shows 35-mile journey underground.

This New Train Track Takes You Underground for a Record 35 Miles (Video)

This New Train Track Takes You Underground for a Record 35 Miles (Video)

Slate in motion.
June 4 2016 7:01 AM

35 Miles Underground Through the Gotthard Base Tunnel

A new rail record in Switzerland.

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An Italian train makes its way at the north entrance of the new Gotthard Base Tunnel the world's longest train tunnel on the eve of its opening ceremony on May 31, 2016 in Erstfeld. The new Gotthard Base Tunnel (GBT) is set to become the world's longest railway tunnel when it opens on June 1.The 57-kilometre (35.4-mile) tunnel, which runs under the Alps, was first conceived in sketch-form in 1947 but construction began 17 years ago. / AFP / FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)

Photo by FABRICE COFFRINI/AFP/Getty Images

Welcome to the longest and deepest train tunnel in the world. The Gotthard Base Tunnel finally opened this week in Switzerland, where it travels underground for 35 miles and takes passengers 1.4 miles beneath the surface. It’s part of a series of projects aimed at improving trade routes and reducing pollution from trucks traveling through Europe.

Voters approved the project in 1992. It took $12.5 billion and 17 years of intensive construction to finish, but the Swiss completed it on time.