The Great Wall of China

It took millennia to build, but today the Great Wall of China stands out as one of the world's most famous landmarks.

2:15m watch

Related Videos

Builders of China's Great Wall

The Great Wall of China was constructed over several centuries and claimed the lives of thousands of builders.

Religions of Ancient China

Emperor Qin Shi Huang searched for divine acceptance by offering gifts to the gods.

Early 20th Century U.S.

Avoiding Disaster on Titanic

With just 37 seconds to react, could Titanic have avoided disaster—or was the tragedy inevitable?

Early 20th Century U.S.

Titanic's Achilles Heel

Weighing the evidence and first hand accounts, a team of researchers attempts to discover the causes and truth behind the wrecks of Titanic and Britannic.