Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

Beautiful carved tunnels.

The fantastic architectural models of a French traveler.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

Sleep in a climate-controlled plastic bubble for the night.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

A Gothic cathedral created from volcanic rocks.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

This massive blockhead sculpture hides an entire library.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

The first green space constructed on an elevated viaduct.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

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

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

How did a French journalist’s grave become the sexiest statue in the cemetery?

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

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

Ancient paintings known as the "Sistine Chapel of Cave Art."

A unrivaled and rather horrifying collection of wax dermatological models.

The history of radiation is on safe display at the foot of a radiation science laboratory.

One of the greatest maze designer’s greatest mazes.

Indents in the pavement are all that remain from a grisly death machine in Paris.