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

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

This mysterious artificial cave has long puzzled New Englanders.

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

The homestead of American patriot John Adams.

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

One man’s hobby is another man’s world of metal wonders.

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

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

Home to the Titanic Historical Society's collection.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

Eclectic collections, artwork, and some feline friends fill the writer's former home.

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

35,000 grape hyacinths flow like water down a garden hill.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

An eccentric inventor's castle home with its own indoor weather system.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The lantern carried by the infamous Guy Fawkes when he was arrested while attempting to blow the houses of Parliament and the King of England to smithereens

Legend says this public grazing area hasn't been plowed for thousands of years.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

The shop where the girl who inspired the beloved character once bought sweets is now a book-themed commercial curiosity.

This 11th century tower is said to be the oldest building in Oxford.