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

Three prestigious academic collections come together to create a world-class natural history museum.

Giant topiary dog once played a role in a terrorist bomb plot.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

This supermarket is suspended 25 feet above an interstate highway.

Second largest wastewater treatment plant in the country.

The hill that gave the Massachusett tribe, and later the state, its name.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

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

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

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

The site of Paul Revere's historic two lantern warning.

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.

Impossibly life-like natural history models created out of glass by a father and son.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

An elaborate, hidden model train in the Needham Town Forest.

The modern birthplace of Irish freedom.

A hugely vast Irish landscape of barren rock that stretches for miles.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The ancient tomb acts as a calendar that keeps perfect time.