This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Even Henry David Thoreau found this glacial pothole irresistible.

A 12,000-year-old bog boasting rare plants and fauna.

The final resting place of a wealthy landowner who helped create the largest public park in Western Massachusetts.

A pig barn converted into one of the most eclectic residences in Nantucket.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

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

This beautiful architectural gem was the first waste treatment facility in Boston.

This stone tower in a small town's graveyard looks as though it would be more at home in a fairy tale.

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

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

A Medieval Water Tower in the Heart of Massachusetts.

This lakeside tower is the third attempt at getting a tourist destination to stick on the spot.

This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

The Cape Cod house that whaling built.

More than 200 unconventional musical instruments that anyone can play.

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

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

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

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

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

A steampunk wonderland that preserves America's history of industrial innovation.

Hut with supplies for shipwreck survivors.

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