A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

World's first "penitentiary," meant to be humane, drove men insane.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

The secret city built by the Manhattan Project.

Tour the sci-fi-esque reality of governmental disease management.

Mai Tais and Navy Grog served up in one of the original tiki bars.

Home of an evil witch famous within southern folklore.

Once one of the largest producers of pig iron in the world.

This simple, broken column marks the final resting place of one of America's most famous explorers.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

Settled in 1696, abandoned after the Revolutionary War.

The clever workshop that has been designing some of the most unusual coffins imaginable.

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

Where beer lovers can literally immerse themselves in beer.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

The abandoned personal amusement park of the King of Pop.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Human-made caves excavated to hide a secret society of wealthy pagans.