The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This striking statue brings a scene from the African savannah into central London.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

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

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

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

These markers are used to document elevation changes around the famed dam.

An exotic wildlife habitat right off The Strip.

A giant Troll lurks under one of Seattle's oldest bridges.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This former coal gasification plant found a curious second life as a popular public park.

Deep into the lower floors of Pike Place, find a date with fowl fate.

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.

This cheese shop also houses a museum devoted to Dutch dairy.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

The history and future of cannabis.

Go inside to really appreciate this 500-year-old technological masterpiece.