A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

This quirky museum will make you question everything, including the shape of the planet.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

A herd of colorfully painted bovine statues can be found in the middle of "cowtown."

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Avoid gangster interaction while window-shopping.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

A self-built castle made by a mysterious man.

The unusual burial monument of Arizona's first governor.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Every animal in the torah taxidermied and crammed into a Brooklyn townhouse.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A mass grave for victims of one of the city’s worst fires.

One of only two remaining Victorian-era greenhouses in New York.

Compensation for the destruction of a historic shipyard.

A world of whimsy and wonder aboard a one of a kind historic landmark vessel.

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

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

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