Microscopic scenes; some call it novelty, some call it art.

This automated sculpture of two men peeing will spell out text messages with their micturition.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

An eerie, little-known Neapolitan museum filled with preserved human remains.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

Richard Luke Concanen never set foot on American soil.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

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

This doorless 20th-century elevator doesn't stop or slow down.

An existential riddle in the world's largest ancient castle.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Macabre astrological automaton clock dating to the late 1400s.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”