For more than a century, Parisians have come for affordable dishes in a grand converted train station.

Marvel at the opulent Art Nouveau interior while dining on dirt-cheap French classics.

Order a boozy baba au rhum at the oldest patisserie in Paris.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

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

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This massive library holds what was once the largest book collection in the world.

These marks in Myddelton Passage aren't your run-of-the-mill vandalism, and they weren't made by your typical vandal.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

This life-size monument honors the legacy of a famous literary feline.

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

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

Dictionary Johnson’s favorite feline.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

A domino effect created with Britain’s iconic telephone boxes.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Artists and musicians now rule over this former rail station.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

The final resting place to 300 Victorian-era pets hides inside the city park.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A tongue-in-cheek arcade where the games are based on everyday life.

Its incredible collections are dedicated to preserving Mexico's film history.