The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

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

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

A subterranean shelter remains intact under a busy Paris railway station.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

France's national museum of scientific and industrial instruments.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A 16th-century horror show built in a lovely Italian garden.