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

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

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

Impossibly life-like natural history models created out of glass by a father and son.

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

"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."

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

Three prestigious academic collections come together to create a world-class natural history museum.

Amsterdam's Red Light District leaves little to the imagination.

A public urinal so pretty, it was declared a national monument.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

The final resting place of the poets Shelley and Keats.

2300-year-old Roman road connecting the empire.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

The last bastion of Roman presence north of the Alps looms over a German town.

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

The world's largest rotating world.

The official peace statue of the Commonwealth of Massachusetts.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.