Built hundreds of years ago this downtown iron barrier once protected a much despised king.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

Once America's longest-manned military fort, now an abandoned hulk.

Plot your trip through the city on the sidewalk.

A bit of retro transportation flair preserved in the world's largest department store.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

A natural gas leak provides a flickering flame beneath a waterfall.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A celebration of capitalism in Midtown.

New York City's smallest piece of private property.

One of only two commuter aerial tramways in the United States.

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

A semi-scholarly approach to sex.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

This studio was home to David Bowie's first single, even if it did turn away the Beatles.

An architectural oddity hides in plain sight on this iconic London bridge.