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

A roadside park in eastern Maine first marked the halfway point between the equator and North Pole with a brass pin in 1896.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

Rochester's signature culinary delicacy.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

The whole world in one water tank.

A unique columnar residence built in the 19th century.

Where Eunice Williams was murdered by natives, and where locals say her ghost still haunts.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

This is the house that spite built.

New York City's smallest piece of private property.

This picturesque abandoned home is rumored to be a spite house.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Located in a beautifully restored ice house, this museum is the result of decades of hard work and devotion to the craft of plumbing.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

A little Lego easter egg is hidden underwater in the Boston Tea Party tableau at Miniland.

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

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

The Boston square dedicated to the dark poet who was born nearby.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A monument to the military service of America's greatest traitor refuses to even name him.