The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

Dynastic Home of the De Piro Family.

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

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

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

A museum which takes visitors to the côté obscure of Paris.

The historic Masonic Lodge in which the first-ever female Mason was initiated.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

19th century pendulum and a clock restored by a rogue group of guerilla artists.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

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

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

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

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

Weird wax anatomical models reside here, as do other anatomical specimens.

A museum of magic with a Sadist past.

A surrealist timepiece by the artist of melting clocks.

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

A font of vintage porn on the silver screen.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's national museum of scientific and industrial instruments.

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

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