More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

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

One of only two remaining Victorian-era greenhouses in New York.

A notorious punk house turned co-op.

Two New York rooftops are home to the largest rooftop soil farms in the world.

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

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

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

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

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

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

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

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

This innocent-looking townhome is actually a subway exit.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

The first and only carousel with a lineup entirely of insects.

Final resting place of Typhoid Mary.

A former connection to City Island, it has been abandoned since the 1930s.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

The famous author's cottage hideaway.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.