Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

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

The mosaic Star of David at the front of this store hints that it's no ordinary Italian grocer.

The famous author's cottage hideaway.

Harlem park dedicated to compulsive hoarders killed by their own junk.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

From scholastic to sepulchral - now under reconstruction.

A Manhattan Episcopal church with an eerie underground crypt.

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

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

Oldest Protestant church in the Middle East, designed to resemble a synagogue.

With its vast selection of books, comics, and records, this nearly 70-year-old open-air market always rewards the patient browser.

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

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

A public work of art that also provides some relief from the summer heat.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

Prank calls to this place, originally the "Tube Bar," inspired the creation of a Simpsons character.

Brooklyn's most iconic restaurant, resurrected.

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

Ancient serpentine sacrifice holder that has stood the test of time.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

A library and shop devoted to the body, mortality, and bringing to light forgotten or neglected histories

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.