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

A historic house left in "dramatic still life."

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This magical-looking island is notorious for the misfortunes suffered by its owners.

A sulfuric hellscape in southern Italy.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

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.

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

A Romanesque tower appears when water levels drop.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Cat art as far as the eye can see.

The most decorated dog of World War I is preserved in the Smithsonian.

Home to items never before seen by the public.

A beautiful Victorian-era cemetery, complete with a miniature village.

Dim sum, served in a grand old theater.

Toy museum in a former tavern is the expression of one man's life pursuit of the aesthetic power of cartoon imagery.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A popular tourist cave with a dark past.

Towering basalt columns, a creation of fire and ice.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.