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

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

A museum of magic with a Sadist past.

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

A museum of carnival attractions where you are invited to ride the rides.

This massive library holds what was once the largest book collection in the world.

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

The amazing wonder cabinets of a very rich Austrian archbishop.

A cheeky architectural easter egg.

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

300 years of pharmaceutical history on display.

One man's personal kunstkammer, museum and shop.

UNESCO-protected ancient burial ground.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

A Hungarian optometrist's charming collection of Asian art and curiosities.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A forgotten graveyard lost in the tangles of an overgrown garden.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

A small but immensely extravagant palace built by the "Night King."

A fake Transylvanian castle houses a cathedral of antlers.