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

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

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

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

Stolen goods adorn the organ at Old North Church.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

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

Historic Hull Street was actually the first street with a proper name in the Boston area.

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

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

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

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

The massive machine creates cracking displays of indoor lightning.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

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

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

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

One of the last remaining movie theatres in the country that features a rear-projection system.

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

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

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

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

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

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.