This might just be the TARDIS of bookstores.

A museum dedicated to a Cold War era sausage.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

A silly medieval mural preserved on the side of a Viennese house.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

This historic Benedictine monastery brews a booze so toxic that it has often been blamed almost singularly for Scottish hooliganism.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

The last of the 19th-century booze-free bars has been slinging teetotal tonics for over a century.

You can spend the night in Dr. Frank-N-Furter's castle.

As lake waters recede, a German village reemerges after more than a hundred years.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

The highest point in Belgium is a staircase to nowhere.

Dedicated to the unsung history of human waste.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A kaleidoscopic warehouse-maze of handmade neon signs.