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

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

Built just after the American Revolution, the oldest row house in New York City still stands in Chinatown.

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

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

New York City's first Modernist house.

Storage warehouse of the rich and famous.

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

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

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.

The home of one of America's most beloved fictional characters has become a real world landmark.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

The only remaining building in New York to see the inauguration of a president is being slowly overtaken by a grocery store.

Nope, not Washington Irving's house.

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

These ornate manhole covers were used for a now-forgotten purpose.

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

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

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

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

This vacant church in the Financial District was once the heart of New York's first Syrian immigrant community.

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