A simple midtown bar was once the home of a secretive and exclusive club staffed by "bunnies" under Hefner's strict rules.

Whale bones, scrimshaw, and sperm oil make up just a part of this comprehensive collection of whaling history.

The competition: breathe deeply as long as you can.

A hidden architectural treasure in New York's Brooklyn.

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

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

The Underground Railroad passed right through this historic Brooklyn Heights church.

The lost town of Neversink, sunk by New York City.

An unconventional space for art and science housed in a massive old warehouse.

Take in a rare, face-to-face glimpse of Lady Liberty at this tucked away Red Hook park.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

Red frames showcase remnants of one of New York's original subway stations.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

Brooklyn's most iconic restaurant, resurrected.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Set sail on a small scale.

Townhouse facade doubles as an RMS Titanic Memorial.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Four cars from the old system were once on display, but were removed in 2014.

Once a ferry dock, radio transmitter, and now a new Greenpoint park.

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

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.