This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

This free, take-a-book shop seems like a trick but isn't.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

A fairytale art house in the middle of Wisconsin.

Where beautiful signs live on forever.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

A museum befitting the city responsible for supplying the majority of the world's LSD.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

More than a century of radio history is told in these displays.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The whole world in one water tank.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

A strange egg in a mucky bog of western Ireland marks the spot of an aviation milestone.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

The world's largest commercially available hamburger is complete with 15 pounds of lettuce, 30 pounds of bacon, and 36 pounds of cheese.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

This rare volcano spews the strangest and (literally) coolest lava in the world.

An American flag was erected for every day that passed during the Iranian Hostage Crisis.

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.