The Great Rift Valley in Africa may eventually split the continent in two, forming a new ocean in millions of years.

There are more pyramids in Sudan than in Egypt — the Nubian pyramids number over 200.

The Panama Canal connects the Atlantic and Pacific Oceans.

Petra in Jordan was carved into rose-colored rock cliffs.

The Nile River has supported civilizations for thousands of years.

The Dead Sea lies at one of the lowest elevations on land.

Zhangye once stood along the Silk Road as a trade hub.

The Colosseum in Rome could hold between 50,000 and 80,000 spectators and had a retractable awning called the velarium.

The Earth's mantle lies between the crust and core.