This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

A church filled with the bones of hundreds of virgins martyrs—or so they say.

The topiary maze at the Habsburg hunting lodge.

Op-art architecture designed for happiness.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

A world-class observatory in the California desert.

The first American department store, and home to the largest operating musical instrument in the world.

Lehigh Valley barge No. 79 still gets tugged along - but now it houses a museum and unusual performances.

Where there’s manufacturing, there’s fire!

A dilapidated dock tells the story of Titanic's missed arrival.

Visit the site of a subway powered by nothing more than air--and lots of it.

Phil Mortillaro uses keys to bring art back to the Village.

A crumbling hospital from the 1850s on Roosevelt Island.

An accidentally hidden library containing the ephemeral history of New York.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The headquarters of the famous Yale society.

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

The hidden jewel of Disneyland: a members only playground for the Disney elite.

A giant donut stands as a popular symbol of Los Angeles iconography.