tunnel

Adding credence to the many legends surrounding them, there are numerous tunnels beneath Colorado's State Capitol building.

Did you know that running underneath central Indiana are some rather eerie catacombs? It's true, and you can even tour them.

For the first time, you can get so close to Niagara Falls, that you can actually feel them. A century-old tunnel, 180 feet below takes you to an underground world and a view like never before.

An interesting piece of history that also tells a story in a rural area of southern Michigan lies just beneath a busy interstate highway.

One tunnel in east Tennessee however is said to be a "portal to hell" it's even been dubbed the "most haunted tunnel in the world."

Urban explorers find a tunnel system under the west Michigan city of Kalamazoo.

There are miles of tunnels under Springfield, Missouri. They're not secret, but do arouse the imagination of many.

The best-known urban legends around North Adams, Massachusetts involve the haunted Hoosac tunnel and a cryptid along Coca-Cola Ledge.

A sprawling convent campus in Monroe, Michigan dating back to 1845 has a secret network of underground tunnels, take a virtual walk through them.

Quincy, Illinois is above a speculated deep tunnel crossing America's midsection.