A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

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

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

The notorious headquarters of a corrupt political machine.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

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

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

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

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.

Unrepaired walls from a 1920 anarchist bomb attack.

Hear the tales of New York's most notorious criminals.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

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

New York City's only preserved family home from the 19th century.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

Avoid gangster interaction while window-shopping.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

A hidden "place of interment for gentlemen."

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

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

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.