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

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

A unique columnar residence built in the 19th century.

This unassuming Massachusetts residence was built with a trap door to hide escapees on the Underground Railroad.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

This headstone-like marker inscribed with three words has been an utter mystery for over a century.

The proud hometown of an American legend has honored their favorite son with what seems to be a gravestone.

Last church of this militaristic WWII style.

It took 275 years and four burials to finally put the Mayflower’s most famous passenger to rest.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

This massive boulder is inscribed with the story of a sensational hostage negotiation dating back to Colonial times.

This giant Massachusetts sycamore is said to hold the dubious distinction of being the "widest tree East of the Mississippi!"

Tragedy on Little Brewster Island memorialized.

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

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

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

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

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

The right to a full beard is honored by the grave of a man who was attacked and jailed due to his facial hair.

This popular Boston haunt is reminiscent of a time gone by, when slow cafes and sweet-smelling smoke wafting from patios was the norm.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

Haunted boulder in a front yard with a witch painted on it.