In the 1930s, workers bored a 13-mile tunnel beneath Mt. San Jacinto. Here's a look inside the engineering feat that carries ...

Wearing a red hard hat and carrying a backpack with an emergency oxygen tank, I’m sweating as I get a rare look at the newest wonder of the world—the 35.4-mile Gotthard Base Tunnel ...

The Zoji La Tunnel, which is set to be the longest in Asia, will pass under the Zoji La pass in the Himalayas, the world's highest mountain range. The aim of the tunnel is to provide year-round ...

Colorado and Union Pacific Railroad have signed a landmark 25-year lease agreement for the historic Moffat Tunnel, paving the ...

The deal extends Union Pacific's lease of the Moffat Tunnel, which crosses under the Continental Divide east of Winter Park.

Colorado has finalized a landmark agreement with Union Pacific Railroad that modernizes a century-old lease for the Moffat Tunnel, setting the stage for expanded mountain passenger rail service ...

The Morton Mountain Tunnel on US-441 near Gatlinburg, Tenn. Photo by Nick Langan. Cities like New York, Boston, Seattle, Baltimore, Detroit–Windsor and Pittsburgh all have heavily trafficked tunnels, ...

Thousands of workers are battling the elements to build India's longest tunnel in the Himalayas. But the Zojila tunnel has a greater purpose, as it could be a game changer for India in the country ...

The 13-mile-long San Jacinto Tunnel was bored through the mountain in the 1930s by a crew of about 1,200 men who worked day and night for six years, blasting rock and digging with machinery.

Scott Reierson, an operations and maintenance supervisor for the Metropolitan Water District, leads a group on a tour, walking through a 16-foot-diameter tunnel toward the west portal of the ...