Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

The intriguing personal collection of a professional demon-chaser.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

The largest greenhouse in the world is home to over one million types of plants.

A 30-acre garden inspired by the principles of modern physics.

Eyam took steps to quarantine themselves and keep the plague from spreading.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

The final resting place of the poets Shelley and Keats.

Eclectic collection of dark and macabre antiques.

Iron Age "bog person" preserved for over 2,300 years.

Preserved "bog person" that is over 2,000 years old.

The largest catacomb system in the world.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

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

A beautiful young girl said to have been buried alive in her coffin…

Ruins of the laboratory where a mysterious doctor invented an embalming fluid and stored his mummies.

Legendary site where an evil bishop was devoured by rodents.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

England's most notorious suicide spot.

Medieval Danse Macabre Fresco in Northern Brittany.

Venice's island of the dead.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.