Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Rummage through this sunken ship, but leave your scuba gear at home.

There must be a pun in this haystack somewhere...

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

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

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

A spring-fed pool so deep it's used for scuba diving as well as swimming.

A Prada store in the West Texas desert that is never open for business.

Minimalist modern art on a repurposed military base in rural Texas.

Mysterious glowing orbs float through the desert night.

Man-made geyser that rises to the exact height of the Gateway Arch.

Less a museum than a bizarre fantasy world created by artists and engineers.

A museum dedicated to exhibiting remarkable outsider art.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Two community gardens under the elevated subway lines on a very busy commercial strip in Bushwick.

A bit of retro transportation flair preserved in the world's largest department store.

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

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

Once called Winthrop Park in 1889, home to a decidedly sexy tribute to the Monitor vs. Merrimac battle.

A library and shop devoted to the body, mortality, and bringing to light forgotten or neglected histories

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

Cryptic messages embedded in the New York City sidewalk.