A hike through miles of abandoned train tunnels along the Donner Pass near Lake Tahoe is like visiting a graffiti art gallery ...

Switzerland just opened the longest and deepest train tunnel in the world; a $12 billion project that took 17 years to complete. Produced by Lamar Salter Follow BI Video On Twitter More from Tech ...

For all their stark beauty, the Alps have always posed a heck of an obstacle to trains traveling between the North Sea and the Mediterranean. Since 1882, the old 9.3-mile Gotthard tunnel has had ...