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

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Nondescript elevator doors open to reveal a stunning, surreal world.

Lie in a hammock where George Washington stood.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

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

Plot your trip through the city on the sidewalk.

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."

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

An unrealized dream to wirelessly electrify the entire Earth.

A hidden "place of interment for gentlemen."

The oldest surviving synagogue in New York City is now a soaring art space.

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

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

One of only two commuter aerial tramways in the United States.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

New York City's smallest piece of private property.

A dilapidated dock tells the story of Titanic's missed arrival.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.