Second largest wastewater treatment plant in the country.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This supermarket is suspended 25 feet above an interstate highway.

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

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

A unique columnar residence built in the 19th century.

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

The massive machine creates cracking displays of indoor lightning.

The mansion home of author Edith Wharton.

A steampunk wonderland that preserves America's history of industrial innovation.

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

Civil War Fort on an island in the Boston Harbor.

Founded by the famed children's book artist, this museum spreads an appreciation of the arts through picture books.

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

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

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

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

Ice cream stand, snack bar, and time capsule of milk conveyance.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

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

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.