Originally constructed as tombs for ancient pharaohs, more than 100 pyramids remain in Egypt. But so does one crucial question: How were they built? This installment of the History Channel's "Modern Marvels" series travels back in time to investigate the evolution of Egyptian pyramids -- from the first primitive efforts to the great masterpieces of Giza -- to shed light on the mysteries that keep modern audiences fascinated.

In Hollywood, they are the home to killer mummies and booby traps. Now, separate fact from fantasy with THE HISTORY CHANNEL in this exciting tour of the Egyptian Pyramids, which traces the rise of one of the ultimate accomplishments in the Ancient World.

Constructed as tombs for the ancient pharaohs, over 100 pyramids remain in Egypt. Built during a span of well over 1,000 years, they stand as cultural and engineering marvels of staggering proportions. But many facts about these monuments - including the exact methods used to construct them--remain tantalizingly obscure.

Travel back in time as THE HISTORY CHANNEL investigates their evolution, from the first primitive efforts - such as the flat-roofed tombs called ""mastaba"" - to such magnificent works as the Step Pyramid, Bent Pyramid, and of course, the great masterpieces of Giza: the Necropolis!