Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

No one messes with the Massachusetts sacred cod, not this time...

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

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

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

This is the house that spite built.

The bears may be gone, but their old cages can still be found.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

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

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

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

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

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

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Impossibly life-like natural history models created out of glass by a father and son.

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

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

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

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."