This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

A reminder to choose water over wine since 1888.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

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

The former sign of this immortal music venue is just that--undying.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

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

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

There are owls with glowing eyes in Herald Square.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

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

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.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

Bowl in splendor, if you're lucky.

Lie in a hammock where George Washington stood.

Wine bottle sculpture with a ship's stateroom inside.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

One of Europe's oldest libraries.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.