In which country did the world's longest tunnel open on 1 June 2016?
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Answer:Switzerland's
Switzerland's Gotthard Base Tunnel, the world's longest and deepest railway tunnel, officially opened on the 01 June 2016, 17 years after the start of construction. Switzerland is celebrating the opening of the 57 kilometre Gotthard Base Tunnel which will connect northern and southern Europe under the Swiss Alps.
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switzerland
switzerland gotthard base tunnel the worlds longest and deepest railway tunnel officially opened on the 1 june 2016,17 years after the start of construction . switzerland is celebrating the opening of the 57 kilometer gotthard base tunnel which will connect northern and southern europe under the swiss alps.
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