Over 50 whirling pools left behind from the glacial age.

The massive machine creates cracking displays of indoor lightning.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

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

Civil War Fort on an island in the Boston Harbor.

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

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

The world's largest piece of copyrighted artwork.

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

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

A luxury hotel constructed out of a former jail.

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

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

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.

One of the largest wooden ships ever built is honored by a steel sculpture evoking her once-superlative scale.

This tiny patch of arid sand sits in one of the greenest states in the United States.

The world's largest rotating world.

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

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

New Hampshire's first neighborhood is now preserved as a historic village with live action role players.

Despite its extensive history, this fort saw little to no combat.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."