Once the most densely populated place in the world, this island is now a ghost town.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

Unicorns, elephants, and bears, oh my!

Annual celebration commemorating the 1965 sighting of strange lights in the town.

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

America's oldest archaeological site or a muddled case of wishful thinking.

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

New England's "Witches of Eastwick" locations, in all of their quaint white churched glory.

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

A collection of full-size movie monsters opened to the public.

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

The site of the tragic isolation of Nipmuc Native Americans left to perish in King Philip's War.

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

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

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

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

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

These Nubian pyramids are strange and unique, even by pyramid standards.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Abandoned hotel with adjacent lake and golf course.

Acres of natural wonders left behind by a socialite-turned-gardener.

Exotic feline breeding compound and conservation center.