The mysterious 1,000-foot railroad tunnel in Clinton that helped build the massive Wachusett Dam creates an unsettling ...

As workers began dismantling a traffic tunnel 90 feet below the Houston Ship Channel, one man claims he saw a ghost.

This unfinished railroad tunnel in Oconee County, South Carolina has a lot of history, and now visitors can explore it as a ...

Deep in Angeles National Forest, about 2 miles from where the nearest paved road ends, a random concrete tunnel is carved into the hillside. A second tunnel follows down the broad path shortly after.

An ominous, spiked fence guards abandoned train tunnels tucked away in the hills above Colorado Springs. The fence indicates a closure, with folklore pointing to a dark past of the area. Located in ...

Cincinnati's abandoned 19th-century beer tunnels, dug by German immigrants for lager brewing, are being mapped by the city. The Brewery District Community Urban Redevelopment Corporation has been ...

NEW ORLEANS (WGNO) — Since Hurricane Katrina, Charity Hospital in Downtown New Orleans has been abandoned. One local urban explorer recently went inside to discover more about the underground tunnels.

FREDERICKSBURG, Texas — Until the early 1940s, when people in Fredericksburg wanted to visit San Antonio without having to drive, they took a train. The route by the long-forgotten San Antonio, ...

Gareth Fuller/PA Wire/AP Photo — -- A series of previously closed-off tunnels used during World War II that run along a part of England's coast have been excavated and reopened. The tunnels, ...