The Rocky Mountains form the spine of America, coming down from Canada and reaching south all the way to New Mexico. In the U.S., they're most imposing in Colorado, home to the highest peak and ...

The world’s longest and deepest undersea road tunnel is being built in Norway, intended to cut travel time between major cities and become part of a ferry-free highway along its western coast. The ...

On Thursday morning, you'll be able to use the Armstrong Tunnel once again. After more than two years of construction, it's back open, connecting drivers in Pittsburgh from Downtown to the South Side.

The Tianshan Shengli Tunnel, a 13.75-mile (22 km) long tunnel at the center of the Urumqi-Yuli Expressway, and the world’s longest, is now open in China. Constructed over five years using innovative ...