A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

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

The highest point on the island known for buildings that touch the sky.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

Salute the leader of the proletariat.

A posh members-only club with a literally dramatic history.

The notorious headquarters of a corrupt political machine.

Visit the site of a subway powered by nothing more than air--and lots of it.

A Manhattan office building is home to the world's largest chess board.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Unrepaired walls from a 1920 anarchist bomb attack.

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

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Plot your trip through the city on the sidewalk.

A hidden "place of interment for gentlemen."

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Walk over a 150 year old manhole.

A hands-on traveling collection of the innovative devices of yesteryear.

An unassuming secret door once led to a legendary watering hole.

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

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Try not to get slimed in Tribeca.