It stands as tall as a six-story building and is the length of a jumbo jet. Egypt's Great Sphinx is the biggest single stone statue in existence, and the mysteries surrounding it are equally sizable. When was the monument built, and why? Was it an act of devotion or part of a much larger plan? Join a team of international investigators as they attempt to shed new light on these age-old questions, using the latest research and techniques in order to solve the complex riddle of the Sphinx once and for all.