The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Once swallowed by flood waters, this village has emerged as an eerie shadow of its former self.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A crumbling hospital from the 1850s on Roosevelt Island.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Northern Ireland's Brobdingnagian stepping stones.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The ghostly remains of an accidental sea.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

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

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

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A battle between nature and architecture in the Cambodian jungle.

The final resting place of New Orleans' most famous voodoo priestess.

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

Go inside to really appreciate this 500-year-old technological masterpiece.

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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.