34 / 68

Miners watch as the drill machine 'Sissi' breaks through the rock at the final section Faido-Sedrun, at the construction site of the NEAT Gotthard Base Tunnel Oct. 15, 2010. With a length of 57 km (35 miles) crossing the Alps, the world's longest train tunnel should become operational at the end of 2017. ((AP Photo/Christian Hartmann,Pool)

Miners watch as the drill machine 'Sissi' breaks through the rock at the final section Faido-Sedrun, at the construction site of the NEAT Gotthard Base Tunnel Oct. 15, 2010. With a length of 57 km (35 miles) crossing the Alps, the world's longest train tunnel should become operational at the end of 2017. (

World's longest train tunnel

Switzerland is building in the NEAT Gotthard Base tunnel, which is the world’s longest train tunnel, with 57 km long parallel tracks crossing the Alps. The tunnel should become operational at the end of 2016.