Explore Pennsylvania’s most unusual tunnel and learn the remarkable story behind it that locals still talk about today.

Darkness stretches ahead, cool and still, broken only by the faint echo of footsteps moving through stone shaped long before ...

Archaeologists have completed the first comprehensive technological mapping of an intricate underground tunnel system beneath the ancient Etruscan city of Veii, revealing a sophisticated network of ...

Tunnels may not be glamorous, but there are few things more satisfying than honking your car’s horn when driving in a tunnel bored through a mountain. The urge to test the acoustics of a car horn in a ...

Explore underground tunnels below Over-the-Rhine and the history they hold Explore underground tunnels below Over-the-Rhine and the history they hold Explore underground tunnels below Over-the-Rhine ...

Houston’s downtown tunnels are a six-mile, air-conditioned network linking offices, shops and hotels that form a hidden world ...

The Virginia Dept. of Transportation’s largest ever highway construction project—the Hampton Roads Bridge-Tunnel expansion—will double capacity with two new 7,900-ft-long bored tunnels and nearly ...