Medicinal spa created with the discharge from a geothermal energy plant.

World's largest collection of serial killer artwork and other macabre exhibits.

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

The sign at the garden gate reads: "These Plants Can Kill."

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

A magical place that lets you play in and explore the world of Studio Ghibli.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A church of bones, decorated with 40,000 human skeletons.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A terrific purveyor of natural history objects and curios.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

On Japan's Tashirojima Island, cats are king.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

The Mysterious Witch Bonney, a haunted statue in an old industrial city.

No one really knows how these old hobby horses got here, but the herd keeps growing.

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.