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.

Second largest wastewater treatment plant in the country.

A steampunk wonderland that preserves America's history of industrial innovation.

Solar powered Spectacle Island features all-green facilities.

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.

A beautiful Victorian-era cemetery, complete with a miniature village.

Eliot was the first missionary to produce religious text for Algonquians in their own language.

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

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

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

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

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

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

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

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

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

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

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

Narrowest house in Boston.

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

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

A men’s restroom became a sandwich shop.