A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

This banal Parisian entranceway is not what it seems.

The video game-themed street art first popped up in the French city.

This stone angel is one of the biggest caryatids in all of Paris.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

This small, ingenious cannon once helped regulate Parisian life.

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

Offal and flawless onion soup are on the menu at this restaurant that once catered to the workers of Les Halles.

Shop at the 200-year-old store where Julia Child stocked up on copper cookware.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

Executions were once held near this beautiful 18th-century fountain.

Notorious artist squat renovated into legal studios.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The oldest stone house in Paris was built by its most famous alchemist.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The remains of the man who founded Pennsylvania lie in an unassuming grave in the English countryside.

Home to one of the tallest church spires in Europe, this historic church once played host to King Henry VIII and Anne Boleyn.

A mysterious bridge over a sunken Roman road.

What looks like missing grout is actually an old pub's peephole.

The world’s second-largest flood defense barrier has protected London for decades.