Modest entrances blend into the landscape, masking the scale of this subterranean grid designed for efficient motion and logistics. Freight trains glide through, bypassing steep climbs, while ...

The longest railway tunnel in the world is a 35-mile long journey located in the south of Switzerland surrounded by the ...

Switzerland is widely known for alpine landscapes and world-class rail travel, but a large portion of its infrastructure exists underground. Over several decades, the country has built roughly 1,800 ...