An old dining hall now serves up ghost stories for lusty locals.

The birthplace of America's favorite fruit-flavored mystery dessert.

The mysterious image is believed to show Edward Hyde, 3rd Earl of Clarendon, in a beautiful blue dress.

This slender three-story building has also had several famous residents.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

Depression-era fun lives on in this Harlem museum dedicated to the sport of the street.

The famous facade of Grand Central Terminal hides a regulation tennis court—and it's not the first one.

The oldest living organism in New York City. Maybe.

Constructed in the 1920s, this former pencil factory is now an office building.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

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

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Commemorating the spot where the famous scientist fed his pigeons.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

The former hotel where Tesla invented the radio.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

Plot your trip through the city on the sidewalk.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.