tunnel

This elegant but otherwise unassuming Minnesota home holds a fascinating secret of caves and tunnels underneath it.

There are secret tunnels along the entire length of the Kansas Turnpike that most drivers don't know exist. These bunkers and tunnels could also be lifesavers.

A homeowner in the St Louis suburb of Alton, Illinois got quite the surprise when he discovered a tunnel, dating back to the 1800s under his home.

There is an abandoned and forgotten pedestrian tunnel underneath the service plaza along the Maine Turnpike in Kennebunk.

The Maine Turnpike recently revealed what tunnels look like underneath their toll plazas.

Tunnels under San Angelo, Texas, were thought to be just legends until someone broke through a basement wall during construction opening up a lost world.

They're not for public use and behind locked doors, but for those that can use them, the little-known Depression-era tunnels under Grand Rapids, Michigan come in handy when it gets super cold.

Twin Falls, Idaho, is home to many legends, though there may be more urban legends than true legends and really interesting history including miles of tunnels beneath the city.

Hells Gate is a tunnel located in Brazil, Indiana. Not only does the tunnel have a tragic history, but it's also got a really creepy origin story.