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.

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

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

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

This beautiful architectural gem was the first waste treatment facility in Boston.

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

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

Dedicated to one of the darkest moments in Irish history.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

One of the few remaining monuments dedicated to South Boston's Irish heritage.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

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

Stolen goods adorn the organ at Old North Church.

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

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

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

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

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

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

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

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

Tragedy on Little Brewster Island memorialized.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.