A tiny, heartwarming piece of art hiding in plain sight.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

This Manchester laundromat is hiding something.

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

Makers and sellers of the original and finest York Ghosts.

The final resting place of England's most notorious bandit.

19th century tunnels burrowed under Liverpool.

After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.

This gorgeous space is England's largest independent library outside of London.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Paris' linguistic guide to the international language of, yes, love.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Abandoned railway line circling the city of Paris.