This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

What is it about mushrooms that makes people wish they lived inside of them?

An art deco ice cream shop covered in vintage train station tiles.

Where beautiful signs live on forever.

The inventor of the iconic Pringles can was so proud of his invention he was buried in one.

A sculptural commentary on capitalism pokes up from the East River.

This former crime corner has been turned into an eclectic community center.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

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

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

The most confusing clock in New York.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

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

Little Red Lighthouse under the George Washington Bridge.

The notorious headquarters of a corrupt political machine.

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

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

Salute the leader of the proletariat.

The site of the deadly Triangle Shirtwaist Factory Fire.

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

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

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

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.