The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

The smallest post office in the United States is no bigger than a broom closet.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

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

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

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

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

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

This donated headstone marks the grave of a pair of elderly women who were mysteriously murdered.

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

Supposed Massachusetts Grave of a pre-Columbus Knight Templar.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

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

A mysterious collection of stones stand outside a small New England town.

Over fifty whirling pools left by the glacial age.