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

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

Nope, not Washington Irving's house.

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."

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

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.

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

A small part of lower Manhattan is actually made from a bit of England.

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

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

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

This 220-year-old house is a reminder of New York City's Dutch past.

Site of the first pathological and bacteriological research facility in the United States.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

The greatest real estate coup of all time.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Harlem park dedicated to compulsive hoarders killed by their own junk.

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