Rome delivered fresh water to its people by building massive aqueducts that are still an engineering marvel today.

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

RELATED CONTENT

Ancient rulers built luxurious private residences that rival modern-day mansions.

The Great Sphinx is an engineering marvel even by today's standards.

The Roman Coliseum was an engineering marvel designed to seat close to 75,000 people.

Did you know that the Hoover Dam supplies electricity to more than 20 million people? Get all the facts on this marvel of engineering.

Building the Pyramids