A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This 16th-century monastery has been turned into a surrealist architecture compound.

The middle finger of modernity.

Venice's "Island of the Mad."

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

Statue of death tucked in the University of Medicine courtyard.

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

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

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

Notorious artist squat renovated into legal studios.

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

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

A temple to modernity, tucked away amid Barcelona's more well known museums.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

The footprint of a frustrated devil in Munich's Cathedral.

King Ludwig I's collection of beautiful women.

A stairway to heaven, or to nowhere at all.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.