The remains of a hospital ravaged by fire, once a progressive place of innovations for disabled children.

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

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

A tribute to the couples who brave long periods of separation during wartime.

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

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

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

This boulder with a 200-word legal dedication to God has remained hidden in the woods for over 150 years.

A tiny monument to the classic American candy.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

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

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

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

A defunct all-girls college which may be the resting place of H.P. Lovecraft's real-life Necronomicon.

This abandoned radar station from the Cold War era now only broadcasts a seriously ominous air of isolation.

Civil War Fort on an island in the Boston Harbor.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

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

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

This mysterious artificial cave has long puzzled New Englanders.

The oldest surviving wood-frame building in North America is still in the family.

An elaborate, hidden model train in the Needham Town Forest.

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

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