Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The first pet cemetery in the United States.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

One of the world's earliest skyscrapers.

The oldest pastificio in Queens offers visitors fresh noodles and a peek inside the macaroni-making magic.

The graveyard holds the remains of Irish immigrants who arrived in Queens after fleeing the Great Famine.

A B.Y.O.B. Mexican cantina lives inside one of the last tortilla factories in Brooklyn.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

A temple belonging to the largest Buddhist order in South Korea nestled in the middle of New York City.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

The poet's been ambling through these New York woods since 1940.

This forlorn park is the result of a failed investment turned tax dodge.

Glacial erratic or man-made dolmen? It probably wasn't druids.

The "Skinny House" is made from scrap, salvage, and a neighbor’s kindness.

The site of a fallen tree that protected Americans from British forces during the American Revolution.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

Final resting place of Typhoid Mary.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.