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

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

Two ancient Buddhist temples crown this dramatic rocky pinnacle.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

Retirement home for giant obsolete machines.

A Neolithic celestial calendar standing in a nondescript wheat field.

This natural history museum houses one of the world's largest rat kings, a terrifying jumble of tangled rodents.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

This 21st century cabinet of curiosities includes dinosaur bones, moon rocks, film memorabilia, and more.

What looks like a normal building is really a hollow facade hiding a subway vent.

An odd museum dedicated to French fakes.

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

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

A unrivaled and rather horrifying collection of wax dermatological models.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

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

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Climb inside an iron crystal magnified 165 billion times its normal size.

This giant volcanic crater holds its very own field of salt.

These towering cliffs jut dramatically from the middle of a barren desert.

Village of slate houses, built on a white marble outcrop.