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

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

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

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

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

This memorial honors those who served on Gallops Island Radio Training Station during the second World War.

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

Stolen goods adorn the organ at Old North Church.

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

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

"Mock all and sundry things, but leave the saints alone."

A centuries-old church stands as a testament to Boston's "father of architecture."

This ambitious father and son team reigned supreme over the North End, and witches, for many years.

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

One of the indelible moments of the American Revolution took place at this location.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

A mysterious stone embedded at the base of a historic Boston building.

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

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

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

This historic patch of real estate offers a glimpse of colonial Boston.

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

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