A mysterious echo seems to defy the laws of acoustics.

This 15-foot-tall sculpture stands vigil at the back entrance to the largest public park in western Massachusetts.

Called the “General Motors of the piano industry,” these buildings once produced as many as 700 pianos a week.

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

Plymouth's huge yet little-known memorial to the Pilgrims.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Eclectic architecture in the woods of New York.

The birthplace of America's favorite fruit-flavored mystery dessert.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Civil War Fort on an island in the Boston Harbor.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

Thousands of bottles that have held everything from poison to perfume make up the collection of this small museum.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

A black sand beach where glacial fragments wash ashore and look like sparkling diamonds.

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

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

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

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."