In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

A whimsical, but often overlooked clock in Park Avenue.

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

The former hotel where Tesla invented the radio.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

Hear the tales of New York's most notorious criminals.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

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

Cryptic messages embedded in the New York City sidewalk.

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

Visit the monolithic tomb of America's most famous general.

This innocent-looking townhome is actually a subway exit.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

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

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

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Lie in a hammock where George Washington stood.

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

Nikola Tesla's former home contains an homage hidden from plain sight.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Bowl in splendor, if you're lucky.

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

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.