Western New York's largest independent bookstore doubles as a historical repository of all things Niagara Falls.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

See where Bill Murray kidnapped a hapless Punxsutawney Phil.

The final resting place of the world's first nuclear reactor.

A multiversal transit station located right below a highway interchange.

The largest known open fault in the United States is basically a giant natural refrigerator.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This stone incorrectly marks the 35th parallel, causing some territorial kerfuffles.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

A giant telephone commemorates the last "crank" call ever made in the U.S.

Turns out you can see the world without ever leaving Maine.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

The world's "leaniest" tower encourages you to test the gravity of its situation.

A roadway designed for a visiting monarch.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

The narrowest street in Paris.

A sprawling network of century-old subterranean catacombs lies beneath a nondescript suburban home.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

An architectural oddity hides in plain sight on this iconic London bridge.

The television series' iconic giant foot was borrowed from this classical painting.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Where beautiful signs live on forever.

Covered in tens of thousands of coats of paint, this Indiana attraction holds a world record all its own.