Plot your trip through the city on the sidewalk.

Peek through the gates at this oasis from the city, full of Old English charm.

There are owls with glowing eyes in Herald Square.

Abandoned power station once home to a squatter community, now being developed into an arts center.

Walk over a 150 year old manhole.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

This innocent-looking townhome is actually a subway exit.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

New York City's smallest piece of private property.

Final resting place for the Triangle Shirtwaist fire’s unidentified victims.

A mass grave for victims of one of the city’s worst fires.

More gold than anywhere else, ever.

Become a prohibition rebel.

Final resting place of two dozen New York City harbor ships.

Phil Mortillaro uses keys to bring art back to the Village.

Nature and beauty amidst pollution and industrial wreckage.

Hiroshima survivor on Riverside Drive.

Waterway populated with abandoned projects, including a submarine.

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

A 9-story, poured concrete structure which was used as a glue factory with an indelible smell.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

The only surviving sidewalk clock in Brooklyn.

One of the deadliest American air disasters is nearly forgotten in Brooklyn.