A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

What do we know about the real woman behind one of the Beatles' most famous songs?

The Liverpool street made famous by the Beatles is real.

The quiet field that inspired one of the most famous songs of all time.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

Advice-columnist's bell tower, paid for with pennies.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

Detroit’s downtown castle is one of the oldest structures in the city.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

This sprawling bookstore spans four floors and has more than a million books in stock.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

San Diego's most historic and haunted home.

Memorial stone for GWAR vocalist, depicted in his iconic costume.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.