Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

Unrepaired walls from a 1920 anarchist bomb attack.

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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Walk into the 19th century without leaving Brooklyn.

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

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

Bowl in splendor, if you're lucky.

Gang fights don't just happen on the streets, they happen under them too.

Try not to get slimed in Tribeca.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

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