Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

One of the last remaining movie theatres in the country that features a rear-projection system.

The oldest platform carousel built in the United States continues to delight children in Martha’s Vineyard.

Oldest church in the United States that is still in continuous use.

The hill that gave the Massachusett tribe, and later the state, its name.

One man is on a singular quest to name an island after a famous hip-hop artist.

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

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

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

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

This candy-colored storybook village originated as a 19th-century Methodist campground.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This is the house that spite built.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

This railroad tunnel was once the longest in Massachusetts.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

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

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

No one really knows how these old hobby horses got here, but the herd keeps growing.

Dim sum, served in a grand old theater.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.