History's Greatest Mysteries

Secrets of the Sphinx (6x17)

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Rising from the sands of the Egyptian desert is one of the ancient world's greatest wonders--the mighty Sphinx. This mythological creature, with the head of a human and the body of a lion, looks like it's standing guard at the great pyramids of Giza. But surprisingly, little is known about this 240-foot-tall structure. Who created this massive, mysterious figure? And for what purpose?