The only structure left with direct ties to the Salem witchcraft trials of 1692.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The fairy tale castle of the "fairy-tale king."

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The world's only museum devoted to the wonders of fluorescence.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

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

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

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

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

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

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

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

Crushed coral and crystals give the sand its signature coloration.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

Who knew the Devil's domain was a hot spot for tubing?

This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.

The glowing blue Nymphaeum of Emperor Tiberius.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Climb inside an iron crystal magnified 165 billion times its normal size.