A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

Check out the underground party scene at the "Burning Man of Brooklyn."

Plot your trip through the city on the sidewalk.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

This innocent-looking townhome is actually a subway exit.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Nikola Tesla's former home contains an homage hidden from plain sight.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A hip bar decorated with walls of golden skulls.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

This eclectic sculpture garden in Brooklyn, home to a bizarre collection of art, was once a run-down junkyard.

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

This Orthodox Church's exterior is rather unorthodox.

This nearly invisible wire transforms much of the city into one big, symbolic home on the holy day.