The site of Paul Revere's historic two lantern warning.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Books you don’t need in a place you can’t find.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

No one really knows how these old hobby horses got here, but the herd keeps growing.

A cave dug by a man directed by ghosts to find pirate treasure.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

A historic bridge with a lovely acoustic anomaly.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

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

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

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

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

A beautiful Victorian-era cemetery, complete with a miniature village.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

An enormous, inside-out glass globe built in 1935.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.