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

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

This beautiful architectural gem was the first waste treatment facility in Boston.

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

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

This headstone-like marker inscribed with three words has been an utter mystery for over a century.

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

A historic bridge with a lovely acoustic anomaly.

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

The ruins of one of the first railroads in the U.S. lie hidden within a neighborhood cul-de-sac.

A daybeacon pyramid is about all that's left of this island that is said to have sunk due to a pirate's curse.

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

The only remaining place where you can play this century-old game for cash.

An elaborate, hidden model train in the Needham Town Forest.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

This abandoned radar station from the Cold War era now only broadcasts a seriously ominous air of isolation.

A 19th-century smallpox cemetery is being reclaimed by scrub forest and sand dunes.

The Atlantis of Cape Cod reemerges during the lowest of tides.

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

This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

The Mysterious Witch Bonney, a haunted statue in an old industrial city.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

An 80-year-old house built out of newspapers.

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