On December 11, 2016, the 35-mile Gotthard Base Tunnel (GBT) — the longest tunnel in the world — began full rail service, allowing passengers to ride underneath the Swiss Alps for a trip from Zurich to Lugano, Switzerland, on the Italian border. The tunnel was under construction for 17 years, and has cut down the previous travel time for the same trip by 30 minutes.
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Written by Curiosity Staff June 10, 2016
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