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

An activist who committed her life to peace and women's suffrage.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

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

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

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

An extensive collection of fine art devoted to man's best friend.

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

A small part of lower Manhattan is actually made from a bit of England.

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

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

This nostalgic blast from the grooming past is also a working barbershop.

Finally, you don't have to be a pious Swedish seaman to relax like one.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

One of the last Jazz Age "Wonder Theaters" in New York City.

This small New York museum celebrates the mountainous artwork of a Russian mystic.

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

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

Visit the monolithic tomb of America's most famous general.