One man spent 10 years building a spectacular section of road because no one else would.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Check your calendars; you might be attending a drive-in movie or sitting next to a fashion runway.

The saddest little diner in New York.

An accidentally hidden library containing the ephemeral history of New York.

From this desk Al Hirschfeld drew his influential caricatures of the 20th century's Broadway stars.

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

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

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

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

This nearly invisible wire transforms much of the city into one big, symbolic home on the holy day.

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

The legendary court where emerging basketball players gain their street cred.

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

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

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

The competition: breathe deeply as long as you can.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

This translucent sculpture represents a quintessential component of New York City's skyline.

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.

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

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

A simple midtown bar was once the home of a secretive and exclusive club staffed by "bunnies" under Hefner's strict rules.