World Longest Tunnel

• The world longest tunnel has been constructed in Switzerland.

PC: http://www.gizmag.com/gotthard-base-rail-tunnel-switzerland/43627/

• The 57-kilometer long (35-mile long) tunnel connects northern and southern Europe.

• It took Seventeen (17) years after construction crews started boring beneath the Swiss Alps, the world's longest, deepest tunnel officially opened Wednesday (01 June 2016).
• It incurs the country $12 billion construction cost

PC: http://edition.cnn.com/2016/06/01/europe/switzerland-longest-tunnel-gotthard/

About 2,600 workers have been involved in the construction of the tunnel, with nine losing their lives in the process.

For more information please watch this video;

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