Second largest wastewater treatment plant in the country.

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 parking garage was the site of what was - at the time - the largest cash robbery in history.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

In a town that's had a whole lot of giant chairs this one still stands tall, just not the tallest.

This lakeside tower is the third attempt at getting a tourist destination to stick on the spot.

The infamous Boston Mob ran rackets from an office here in the 1970s.

The world's largest piece of copyrighted artwork.

A disastrous shipwreck and a tragic love story.

Large Massachusetts museum dedicated to Armenian history and culture.

This historic Boston building has gone from personal estate to porn theater and back again.

This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

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.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This impressive Boston holy house is the American mecca for Christian scientists.

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

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

A unique columnar residence built in the 19th century.

Tragedy on Little Brewster Island memorialized.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.