This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Vikings and Evangelicals have both had a hand in this replica medieval church.

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

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

Anyone wanting to know what a dwarven mine sounds like need only visit the tunnels of this New Zealand artillery compound.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This foolish Victorian sea fort was converted to a deluxe hotel.

The world's largest neutrino telescope searches for secrets of the universe at the South Pole.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

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