Date: 22/05/2016

The world gets a little smaller next month with the unveiling of the longest and deepest railway tunnel ever constructed ” a feat of engineering under the Alps that will slash journey times across Europe. The Gotthard Base Tunnel (GBT) in Switzerland is the product of 17 years of work, including cutting through solid rock at depths of up to 7,500 feet. It cost $12 billion ” as well as the lives of eight workers.

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'Incredible' Rail Tunnel Will Be World's Longest, Deepest

NBC News

The world's longest and deepest railway tunnel opens Wednesday in the Swiss Alps, an engineering feat that will cut journey times across Europe.