The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

The stones of this formerly witch-obsessed castle were used to build a church.

Enter the cabin of a life-sized Hindenburg replica.

Legends surround an ancient tree trunk riddled with nails for good luck.

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

A gorgeous example of 13th-century Gothic architecture.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The patron saint of spinsters grasps a container of dried blood.

In the fictional world of Kcymaerxthaere, standing at this site just outside Vienna, Austria, the sky would have been found beneath your feet.

An ornate private entrance to the Vienna subway built specifically for the emperor.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

An exquisite Baroque church in Vienna's old town.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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

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

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

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

Notorious artist squat renovated into legal studios.