A hands-off space for graffiti artists to hone and display their skills.

Hidden beneath the streets of London is a secret subway that only carried mail.

A curious collection dedicated to human and animal anatomy and pathology.

Cat art as far as the eye can see.

The world's only museum devoted to the wonders of fluorescence.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

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

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

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

An antique curios dealer and hybrid taxidermist.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

A charming flea market shop dedicated to retrofuturistic apparati.

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

Paris' linguistic guide to the international language of, yes, love.

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

A unrivaled and rather horrifying collection of wax dermatological models.

A haunting collection of the vanished and disappearing natural world.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

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

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

A curious collection of locks and keys.