Enter The Gotthard Base Tunnel, The Longest In The World
After nearly twenty years of construction, the Gotthard Base Tunnel officially opened in June 2016. This 35-mile tunnel took the title of longest and deepest rail line in the world from the previous record holder, Japan's Seikan Tunnel, which measures 33.5 miles long. The tunnel was built below the Swiss Alps in order to connect the southern and northern parts of Europe. Now, it will only take about two and a half hours aboard a high-speed train in the Gotthard Base Tunnel to travel the 174 miles from Zurich to Milan - down from more than four hours previously. Switzerland says it will revolutionize European freight transport, as reported by the BBC.