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

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

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

Two stunning 17th-century libraries and a cabinet of curiosities.

These jeweled relics have a scandalous and contested past.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

This small town in Germany was once a center of peppermint production, and has the museum to prove it.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

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

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

This beautiful, historic church looks like something out of a simpler past.

This famed marionette theater and museum is bursting with imaginative string puppets.

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.

This museum is rotten with a century of wax medical deformities.

The house that took a plunge into the facade of a museum.

A fairy tale castle in modern Rome.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

This tiny little cave was said to have been a refuge for a saint with a glowing arm.

This German bone house contains the remains of some 20,000 souls.

A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.

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

A 200-year-old collection of oddities and medical paraphernalia.