The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

A 200-year-old collection of oddities and medical paraphernalia.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

The competition: breathe deeply as long as you can.

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

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

The greatest real estate coup of all time.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

A decommissioned military complex that's now a modern industrial park.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

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

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

The most confusing clock in New York.

Commemorating the spot where the famous scientist fed his pigeons.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Detailed facade of a brownstone in Boerum Hill.

Avoid gangster interaction while window-shopping.

The "Seinfeld" diner.

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

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

A celebration of capitalism in Midtown.

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

New York City's smallest piece of private property.

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