Cities of the Underworld

When you think of Egypt, you think of the Pyramids, vast deserts and infamous leaders like Cleopatra. But there's more to the story. Underground Cairo is explored, focusing on ancient structures that have withstood time and countless invasions. Included: a step pyramid built a century before the Giza pyramids; and a tomb containing 2000-year-old mummies. Also examined: the Book of the Dead.