Built over 2500 years ago, the Parthenon remains one of the most visited archeological sites in the world.

FACT CHECK: We strive for accuracy and fairness. But if you see something that doesn't look right, contact us!

RELATED CONTENT

See how civilizations throughout history have designed and managed their plumbing and waste disposal systems.

The Appian Way is the world's first super highway and brought us the first milestone, marking the distance traveled along the road.

During the 700 years of Rome's dominance, ancient Romans built 53,000 miles of roadway.

Get an overview of the ancient leaders who oversaw the expansion and growth of civilizations around the world.

Ancient Egyptians developed a form of aspirin 5,000 years before the advent of modern medicine.

In December 1944, bloody fighting broke out in Athens between occupying British forces and the National Popular Liberation Army (ELAS), a Greek communist resistance group. An NBC News correspondent in Athens recounts events he witnessed throughout the hostilities, which signaled the start of the Greek Civil War.