The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

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

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

An unassuming secret door once led to a legendary watering hole.

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

The "Seinfeld" diner.

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

A crumbling hospital from the 1850s on Roosevelt Island.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Once America's longest-manned military fort, now an abandoned hulk.

The most confusing clock in New York.

The pioneering photographer's prints are immortalized inside her childhood home.

The site of the deadly Triangle Shirtwaist Factory Fire.

On the Hudson resides one of the largest clocks in the world.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

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.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Unrepaired walls from a 1920 anarchist bomb attack.

A cargo of beautiful music.

Lie in a hammock where George Washington stood.

Ride the subways of yesteryear.

A modern zoetrope on the New York City subway.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.