The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

New York City's smallest piece of private property.

More gold than anywhere else, ever.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

A hip bar decorated with walls of golden skulls.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A terrific purveyor of natural history objects and curios.

New York's oldest magic store.

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

Try not to get slimed in Tribeca.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The library of every book lover's dreams.

A New England curiosity cabinet, one hundred years on.

Ancient ruins hidden underneath a modern luxury hotel.

An abandoned Art Deco hotel nestled on the side of a wooded mountain.

Made of bronze and wearing a blue gown, this lady sat in the same location in the Yantic Cemetery for more than 119 years.

This high-perched pachyderm marks the memory of not one, but two elephants gunned down in small New England towns.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.