At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

The nation's second-ever First Lady urged the founding fathers to "remember the ladies."

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

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

A disastrous shipwreck and a tragic love story.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

This supermarket is suspended 25 feet above an interstate highway.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

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

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

The final resting place of a suffragist author.

The 1920s child prodigy author was last seen here at her Brookline home before vanishing at age 25.

This is the house that spite built.

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

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

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

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

Ice cream stand, snack bar, and time capsule of milk conveyance.

A tiny monument to the classic American candy.

This Massachusetts home was the first to have a telephone line and its own phone number: 1.

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

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

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