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

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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

World's first "penitentiary," meant to be humane, drove men insane.

New York's oldest magic store.

A snapshot of the city's fascinating voodoo culture.

Tucked in the back of this amazing antique store is an important piece of medical history.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

A terrific purveyor of natural history objects and curios.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This educational institution and reference library specialize in the psychic arts and mediumship.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

This hidden green space is the city's second largest conservatory.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

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

Repository for more than 22 million pickled specimens.

English antique dealers with a taste for the unusual.

A cluttered and astounding collection of antiquities and curiosities.

A mysterious artist-run cabinet of curiosities and library.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.