This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Christ's blood allegedly preserved in a Belgian town.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A Museum of Psychiatry in a still-operating mental institution.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

The largest medical and anatomical collection in France lies hidden from the public.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Medical history with an amazing, if frighting, collection of wax diseases on display.

Petting this mysterious iron monkey supposedly brings good luck.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

A museum of magic with a Sadist past.

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

Abandoned railway line circling the city of Paris.

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

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

The oldest stone house in Paris was built by its most famous alchemist.

France's most famous cemetery, with some of its most curious tombs.

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