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

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

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

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

The world's largest piece of copyrighted artwork.

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

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

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

One of the now-less-hidden floral gems of the "Emerald Necklace."

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

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

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

The bears may be gone, but their old cages can still be found.

Beautiful steampunk ghosts of early Massachusetts.

This landmark cemetery in Boston was created more than 300 years ago.

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

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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