Blasting explosives like gunpowder, nitroglycerin, and dynamite all work well for carving a tunnel through a mountain. The dense rock walls can support themselves, and they won't collapse into the ...

The cutter head carves a smooth round hole through the rock -- the exact shape of a tunnel. Conveyor belts carry the rock shavings through the TBM and out the back of the machine to a dumpster.

The Guoliang Tunnel is located in the Taihang Mountains ... from all over the world and offers a one-of-a-kind ride through the mountains. Story and editing by Ben Nigh More from Travel A triangle ...

The greatest mining project now being carried out in the West is a tunnel which is being driven into Palmer Mountain 8,400 feet, through 1,400 acres of mineral-bearing ground. The tunnel has ...

While the Blue Ridge Mountains are home to many incredible ... which is about a 40-minute drive away. The trail through the Crozet Tunnel is open year-round for hikers and bikers from sunrise ...

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 ...