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

New York City's only radical feminist independent bookstore.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A hidden "place of interment for gentlemen."

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A no-frills cinephile haven known for showing offbeat, underseen films.

The former hotel where Tesla invented the radio.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

The first museum in the United States dedicated entirely to posters.

This small, hidden cove is home to abandoned boats.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

A Jewish deli run by Yemeni Muslims in an Afro-Caribbean neighborhood is quintessential Brooklyn.

Unrepaired walls from a 1920 anarchist bomb attack.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Have a steam and some blini at this cafe in a century-old bathhouse.

Cryptic messages embedded in the New York City sidewalk.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

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

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.