Commemorating the spot where the famous scientist fed his pigeons.

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

Unrepaired walls from a 1920 anarchist bomb attack.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

A whimsical, but often overlooked clock in Park Avenue.

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

Rummage through this sunken ship, but leave your scuba gear at home.

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.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

The former hotel where Tesla invented the radio.

Relics given to a Manhattan church to avoid seizure by the Italian government.

Hundreds of antique bank vault locks on display in New York City.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Avoid gangster interaction while window-shopping.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

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

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

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

Cryptic messages embedded in the New York City sidewalk.

New York City's only preserved family home from the 19th century.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Wine bottle sculpture with a ship's stateroom inside.