Here's how the tunnel boring machine, or TBM, works: As the 200-ton TBM moves forward, a round cutter head studded with titanium teeth grinds into the tunnel face and splits large chunks off the rock.

Maybe that's because it's also one of the world's steepest roads, chiseled into the mountain by local villagers. The Guoliang Tunnel is located in the Taihang Mountains in China's Henan Province ...

UPDATE: 2:33 P.M. BLAND COUNTY, Va. (WFXR) — The earlier reported crash in the Big Walker Mountain Tunnel in Bland County is now cleared, according to VDOT. All lanes on I-77 North are open.

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 ...

rehabilitate and upgrade the 19-mile-long Mountain Tunnel, a key component of the Hetch Hetchy Water System that takes water from Tuolumne County and sends it to San Francisco. The San Francisco ...

Near the southern end of Skyline Drive, considered Virginia's best fall drive, the Blue Ridge Tunnel is a 4,273-foot-long passage that traverses Afton Mountain. The tunnel was designed by French ...

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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 ...

Ban Tham Cave in Son La is the only mountain tunnel road in Northwest Vietnam, offering a thrilling off-road experience through a dark, rocky passage. A must-visit for adventure seekers! Ban Tham Cave ...