A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

Discover the taste of mold.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

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

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

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

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

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

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

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Jimi Hendrix's legendary recording studio in Greenwich Village.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

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

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

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