The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

19th century cemetery hidden in Brooklyn's Prospect Park.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

A Manhattan office building is home to the world's largest chess board.

The most confusing clock in New York.

The notorious headquarters of a corrupt political machine.

A notorious punk house turned co-op.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

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

Rummage through this sunken ship, but leave your scuba gear at home.

Salute the leader of the proletariat.

A way to take your secrets to someone else's grave.

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

Here, exhibits come with a side of edible history.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

Commemorating the spot where the famous scientist fed his pigeons.

The world's largest collection of materials relating to lesbian history is housed in a Brooklyn townhouse.

New York City's only radical feminist independent bookstore.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).