The only structure left with direct ties to the Salem witchcraft trials of 1692.

Friction between grains of sand cause a curious "singing" sound.

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

An eccentric inventor's castle home with its own indoor weather system.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

The world's largest piece of copyrighted artwork.

Millions of numbers carved in glass represent the tattoos forced upon victims.

Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.

This impressive Boston holy house is the American mecca for Christian scientists.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

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

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

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Ice cream stand, snack bar, and time capsule of milk conveyance.

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

The massive machine creates cracking displays of indoor lightning.

The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.