The world's largest pyramid by volume is not in Egypt — it's the Great Pyramid of Cholula in Mexico.

The Atacama Desert in Chile is the driest non-polar desert on Earth — some weather stations there have never recorded rain.

The Great Lakes were formed by glacial movement.

Africa is so large that the United States, China, India, and most of Europe could all fit inside it simultaneously.

The Colosseum in Rome demonstrates advanced ancient engineering.

The longest cave system in the world is Mammoth Cave in Kentucky.

The Earth's crust is thinner beneath oceans.

The Aswan High Dam controls flooding of the Nile River.

The Phoenician city of Tyre was built on an island.