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

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

A more than 260-year-old crypt built on Boston's oldest English burial ground.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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

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

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

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

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

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

This funeral home had the honor, if that is the correct word, of hosting the funeral of the famous Sacco and Vanzetti.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

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

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

Tragedy on Little Brewster Island memorialized.

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

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.