This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

The highest rapid transit station in the world.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

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

One of the few Glatt kosher delis in the United States is a cornerstone of its Hasidic neighborhood.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

A town trapped in time - 1958 to be exact.

19th century cemetery hidden in Brooklyn's Prospect Park.

In the middle of suburban Staten Island, a nearly 150-year-old bakery is preserving the art of a disappearing New York treat.

Discover the taste of mold.

Little Red Lighthouse under the George Washington Bridge.

New York City's only radical feminist independent bookstore.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

Relics given to a Manhattan church to avoid seizure by the Italian government.

Avoid gangster interaction while window-shopping.

Volunteer-run library dedicated to exploring five decades of activism history.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Nikola Tesla's former home contains an homage hidden from plain sight.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A crumbling hospital from the 1850s on Roosevelt Island.

An artsy hidden staircase leads to breathtaking views of San Francisco.