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.

The massive machine creates cracking displays of indoor lightning.

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

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

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

This plaque is dedicated to one-half of the Magliozzi brothers and their hit radio show, 'Car Talk.'

Memorial to a beloved puppeteer as well as all street performers.

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

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

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

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.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

This is the house that spite built.

A small plaque promises cold, hard cash in exchange for work by the famous pop artist.

One of America's most historic homes also holds a startling literary legacy.

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.

This hidden labyrinth offers walkers some brief peace of mind.

A tiny town in an empty lot was the work of a local eight-year-old.

According to legend, Bob Dylan sneaks in twice a year to eat dinner with Jack.

Friction between grains of sand cause a curious "singing" sound.

An eccentric inventor's castle home with its own indoor weather system.