A cluttered and astounding collection of antiquities and curiosities.

The remains of Crystal Palace Great Exhibition of 1851.

This 1920s Dutch barge is now a floating bookstore.

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

Model Trains and Much More in Hamburg.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

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

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

Saintly bones pressed into a wax effigy of a Catholic superstar.

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

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

A modern-day Lascaux cave underneath Paris.

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.

A unrivaled and rather horrifying collection of wax dermatological models.

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.

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

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

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

A haunting collection of the vanished and disappearing natural world.

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

A museum of carnival attractions where you are invited to ride the rides.