A massive sustainable farm designed by the mastermind behind Central Park.

Every plane, auto, and bicycle in this collection is kept in working order and are regularly demonstrated to the public.

The world's oldest and largest museum of mass transit vehicles.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

The world's largest piece of copyrighted artwork.

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

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

The massive machine creates cracking displays of indoor lightning.

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

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

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

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

The second oldest Jewish graveyard in the U.S. is tiny, with connections to George Washington and Henry Wadsworth Longfellow.

Oldest synagogue in the United States.

A 60-room castle constructed by a horse-racing heir.

The oldest still-operating tavern in the United States was once owned by a pirate.

Mysterious stone tower featured in many alternative histories of the New World.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

The 92-foot-tall structure is based on the aircraft that carried the first Americans into space.

The summer home and later final residence of acclaimed American sculptor Augustus Saint-Gaudens.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

Carved, egg-shaped stone with no explanation.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.