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

A charming flea market shop dedicated to retrofuturistic apparati.

The largest medical and anatomical collection in France lies hidden from the public.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

The Argonaute submarine was the French navy's pride and joy in the 1950's.

This bridge was constructed from the rubble of the infamous Bastille.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

The first green space constructed on an elevated viaduct.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

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.

A museum of magic with a Sadist past.

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