A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The hallucinogenic center of the ancient world.

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

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

Second largest wastewater treatment plant in the country.

The site of the tragic isolation of Nipmuc Native Americans left to perish in King Philip's War.

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

Once a private collection, now the only museum of arms and armor in the Western Hemisphere - CLOSED.

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

The Burnside Fountain and its questionable interpretation.

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

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

New England's "Witches of Eastwick" locations, in all of their quaint white churched glory.

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

Civil War Fort on an island in the Boston Harbor.

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

Stolen goods adorn the organ at Old North Church.

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

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

This landmark cemetery in Boston was created more than 300 years ago.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

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

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