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

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

This railroad tunnel was once the longest in Massachusetts.

This picturesque abandoned home is rumored to be a spite house.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.

Resonating tubes make music from highway overpass.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

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

Located just behind a quiet residential neighborhood, this is ground zero for the Salem witchcraft hysteria of 1692.

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

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

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

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

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

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

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

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

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

"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."