A group dedicated to promoting boating, kayaking and environmental education programs.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

There are owls with glowing eyes in Herald Square.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Take a step inside the picturesque studio of America’s most renowned sculptor.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Little Red Lighthouse under the George Washington Bridge.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

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

A riverfront park that both remediated and preserved its industrial past.

The longest step street in the city.

The famous author's cottage hideaway.

An unassuming stone building houses New York City's oldest seismic station almost 30 feet below the Bronx.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

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

A crumbling hospital from the 1850s on Roosevelt Island.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.