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

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

A Manhattan Episcopal church with an eerie underground crypt.

A modern zoetrope on the New York City subway.

This unusual subway stop was originally a real estate office.

Cryptic messages embedded in the New York City sidewalk.

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

A whimsical, but often overlooked clock in Park Avenue.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

The former hotel where Tesla invented the radio.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

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

There are owls with glowing eyes in Herald Square.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Commemorating the spot where the famous scientist fed his pigeons.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.