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

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

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

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

This Parisian café sticks almost exclusively to an ethos of reuse.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

This church carved into the rocks is full of enchanting stone statues.

A monk spent 14 years carving steps through tuff to make this religious site more accessible to pilgrims.

The oldest operating roller coaster of its kind, the Montaña Suiza has been thrilling riders since 1928.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

The personal library of the founder of modern neurology is open to visitors.

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

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

BDSM, 1930s Style.

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 unrivaled and rather horrifying collection of wax dermatological models.

A museum of magic with a Sadist past.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

Abandoned railway line circling the city of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.