You must take the A train... to the last active cemetery in Manhattan.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

The real-life site of Ichabod Crane's infamous gourd attack.

The oldest continuously inhabited street in America.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

An eccentric playboy's astounding natural history collection.

This mysterious marker puzzles pedestrians and infuriates geographers.

There are owls with glowing eyes in Herald Square.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

Where the four original members of the Ramones hung out and revolutionized punk rock.

A formerly abandoned mental institute, now back in business.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

The gravestone of the suffragist leader attracted extra visitors during the 2016 election.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

A retired subway car stands alone in a field in the middle of Queens.

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

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