New York City's first Modernist house.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Read a book next to a Midtown waterfall.

A Manhattan office building is home to the world's largest chess board.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A very classy 1920s-era bar right in Grand Central Station.

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

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

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

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Commemorating the spot where the famous scientist fed his pigeons.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

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

This semi-hidden Manhattan restaurant is based out of a loading dock.

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

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The first piece of public art dedicated to LGBT rights.

New York City's smallest piece of private property.

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

Phil Mortillaro uses keys to bring art back to the Village.

This slender three-story building has also had several famous residents.

Try not to get slimed in Tribeca.

A touching tribute to the "Queen of Soul."