Medicinal spa created with the discharge from a geothermal energy plant.

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

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

On Japan's Tashirojima Island, cats are king.

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

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Faceless white figures loom over the city from the rooftop.

A man-made island in scenic San Francisco Bay.

A 300-ship graveyard, with a few still visible at low tide.

A winding path built in secret on the edge of the continent.

Beijing's World Park offers the excitement of international sites without the travel.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

What happens here stays here – unless it affects the whole world.

The famous facade of Grand Central Terminal hides a regulation tennis court, and it's not the first one.

Test your business savvy and play the market for cocktails at this stock exchange-inspired watering hole.

Ever wanted the laymen's version of your credit card fine print?

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

From scholastic to sepulchral - now under reconstruction.

Order scoops of pandan, lychee, and black sesame at this family-run institution.