A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

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

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

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

Love, knishes, and best wishes from this legendary Lower East Side bakery.

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

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

The oldest surviving synagogue in New York City is now a soaring art space.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A celebration of capitalism in Midtown.

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

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

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

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

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

Nikola Tesla's former home contains an homage hidden from plain sight.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The "Seinfeld" diner.

A dilapidated dock tells the story of Titanic's missed arrival.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.