This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The "Seinfeld" diner.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Quite simply the largest tree in the world (by volume).

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The world's longest known cave system.

A hands-on traveling collection of the innovative devices of yesteryear.

Home to items never before seen by the public.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The site of the climactic scene from the classic horror film is now a historic landmark.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Elevated freight railway turned wildly successful urban park.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

France's most famous cemetery, with some of its most curious tombs.

Tucked in the back of this amazing antique store is an important piece of medical history.

The world’s first penitentiary, meant to be humane, drove men insane.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.