Commemorating the 1948 creation of the Jimmy Fund, a Boston-based cancer charity.

This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

This plaque commemorates the call between Alexander Graham Bell and Thomas A. Watson.

All that remains of the Whittall mansion are the ruins of the formal garden and its pergola, dedicated to the late Matthew J. Whittall by his widow.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

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

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

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

What may be Boston's finest Art Deco building, located in the city's Financial District.

A plaque marking the famous abolitionist's birthplace often overlooked by visitors to the nearby Charles Sumner House.

A school used as a model for public education across the country.

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

The last remaining 19th-century tenement from Boston's old West End neighborhood.

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

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

The monumental steeple on Amherst College's campus has no church attached to it.

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

This supermarket is suspended 25 feet above an interstate highway.

The world's largest piece of copyrighted artwork.

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

In Gloucester, Massachussets, fishermen celebrate a successful year at sea by charging a lubed pole to capture an Italian flag.

Whimsical cookie-themed plaques mark the birthplace of the Fig Newton.

This unassuming stone commemorates a condiment factory gone up in smoke.

Millions of numbers carved in glass represent the tattoos forced upon victims.