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."

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

The headquarters of a secretive order is also a beautifully-designed park.

This Massachusetts home was the first to have a telephone line and its own phone number: 1.