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

The ruins of one of the first railroads in the U.S. lie hidden within a neighborhood cul-de-sac.

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

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

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

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

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

This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

Civil War Fort on an island in the Boston Harbor.

Where Eunice Williams was murdered by natives, and where locals say her ghost still haunts.

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

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

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

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Hut with supplies for shipwreck survivors.

This mysterious artificial cave has long puzzled New Englanders.

No one messes with the Massachusetts sacred cod, not this time...

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

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

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

A stunning garden filled with fantastical environmental folk art and sculptures.

A men’s restroom became a sandwich shop.

These whimsical works of art tell the story of the city's past and present.