The 28-foot granite map plots the locations of 40 theaters in New York City.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

Toxic waste disaster that founded the Superfund program.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

A fitting attraction for the corn capital of the world.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

The "lovely red Vega" of the legendary record-settling pilot.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

A mysterious echo seems to defy the laws of acoustics.

This "thrice-cursed" island is allegedly home to Captain Kidd's lost treasure.

"X" marks the spot of an echo chamber in the middle of a plaza.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Marta Becket's hand-painted theater in the desert.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The homestead of American patriot John Adams.

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

Elvis's own personal tropical hideaway.

It was once the base for a series of domestic terror attacks.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.