Retribution for death of infamous mob boss Franie Yale was a case of mistaken identity.

Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

This restored house is like a time capsule of the president's unconventional inauguration.

The studio of influential composer Charles Ives is perfectly reconstructed, hidden in the back of the American Academy of Arts and Letters.

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

A man used his Civil War-era fortune to build this sanctuary in memory of his wife.

A mass grave for victims of one of the city’s worst fires.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

A 19th-century architectural wonder designed by the "father of the skyscraper."

Gang fights don't just happen on the streets, they happen under them too.

Whale bones, scrimshaw, and sperm oil make up just a part of this comprehensive collection of whaling history.

Its original statue was deemed so ugly, locals called it “Scary Lucy.”

What remains of the simple red brick chapel where the women's rights movement began.

The only surviving sidewalk clock in Brooklyn.

The final resting place for the famed creator and narrator of "The Twilight Zone."

Antique skeletons and taxidermy creatures were found crammed in a university closet.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

Where infamous mobster and leader of Murder Inc. Albert Anastasia made his home.

One of the last taxidermists in New York City.

For 20 years, local pumpkins have met their fate on the iron fence surrounding this Cobble Hill home.

Three stories above you, your salad is being grown.

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.