This massive underground salt mine now holds a sci-fi theme park in its depths.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

This maintained cabin is where Josie Morris, an occasional associate of Butch Cassidy, lived out the last 50 years of her life by herself.

Where you can hail your favorite fictional commanders-in-chief.

The unbelievably opulent home built for an infamous newspaperman.

Press 1 for knock-knock jokes.

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

A museum dedicated to telling lies in service of the truth.

The oldest Naval chapel in the United States is home to an incredible collection of Tiffany stained-glass windows.

A big museum full of little worlds.

A surviving concrete arrow from a 1920s navigational network is preserved right off a modern freeway.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

One person's lost luggage is another person's treasure.

A magical place that lets you play in and explore the world of Studio Ghibli.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

A painfully obvious spy house sits right across the street from the Russian Embassy.

Vermont's hills are alive with the sound of music at this historic hotel.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.