Passengers on this mountain railway – which has trains resembling sleek glass orbs - pass through three tunnels and two bridges. The most spectacular bridge is the one spanning the Muota River.

The Bernina Express is one of the world's most celebrated scenic trains, travelling 89 miles through the two beautiful ...

When will crews complete the first of 10 projects to build new tunnels connecting New Jersey and New York under the Hudson ...

U.S. President Joe Biden arrives to give a speech on the Hudson River tunnel project at the West Side Yard on January 31, 2023 in New York City.

The Fehmarnbelt tunnel will carry two rail lines and a pair of two-lane highways under the Baltic Sea. Femern A/S. Sign up for Unlocking the World, CNN Travel’s weekly newsletter.

Five projects are now underway, in North Bergen, at the Hoboken-Weehawken border, on the western edge of Manhattan and in the middle of the Hudson.