Darkness stretches ahead, cool and still, broken only by the faint echo of footsteps moving through stone shaped long before modern machines existed. A sense of awe settles in as the mountain reveals ...

Pennsylvania is home to one of the most fascinating tunnels in America. The Laurel Hill Tunnel stands out not just because it's a passage through a mountain, but because of its incredible history and ...

Add Yahoo as a preferred source to see more of our stories on Google. 00 longest tunnels opener laerda Tunnels are used to carry traffic through some of the most extreme terrain on the planet and they ...