This outdoor gallery of sculptures along the East River was once a landfill.

Nope, not Washington Irving's house.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

There are owls with glowing eyes in Herald Square.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

The highest point on the island known for buildings that touch the sky.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

Little Red Lighthouse under the George Washington Bridge.

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

There must be a pun in this haystack somewhere...

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

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

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Ride the subways of yesteryear.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

This tiny home was originally a narrow alleyway.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

A historic home with ties to the abolition and suffrage movements.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

This tiny little island has, as the name says, just enough room for its single house.

A castle built for love, and abandoned due to heartbreak.