The massive machine creates cracking displays of indoor lightning.

Once the largest gravity dam in the world.

The homestead of American patriot John Adams.

The hill that gave the Massachusett tribe, and later the state, its name.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

The world's largest piece of copyrighted artwork.

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

This picturesque cottage was the site of Ulysses S. Grant’s final and perhaps most important campaign.

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

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

The final resting place of a wealthy landowner who helped create the largest public park in Western Massachusetts.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

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

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

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

The final resting place of a suffragist author.

One of the last remaining movie theatres in the country that features a rear-projection system.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.