This collection of Japanese luck idols beckons visitors with over 2,000 waving paws.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

A shrine to a skeleton saint in the city of angels.

The attic of a four-century-old canal house hides a clandestine church.

One of Ireland's most infamous prisons for rebels including men, women and children.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

The self-mummified monks of Japan.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

The most powerful waterfall in all of Europe.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

The history and future of cannabis.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Repository for more than 22 million pickled specimens.