A unique columnar residence built in the 19th century.

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

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

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

The massive machine creates cracking displays of indoor lightning.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

A humble garage, world-famous for being the epicenter of a technology revolution.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

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

This 19th century train workshop is a treasure trove of railroad history.

No one messes with the Massachusetts sacred cod, not this time...

A tiny survivor of the Donner Party disaster.

The California capital city once stood 10 feet lower than it does today.

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

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

A huge musical instrument played by the ocean.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

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

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

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."