The great pyramid of Giza, also known as the Pyramid of Khufu, was built approximately 2500 years before the birth of Christ. At 481 feet high, the Great Pyramid was the tallest man-made structure in the world for over 3800 years. It consists of 2.3 million blocks and was built in 20 years which would involve moving an average of more than 12 blocks into pave each hour, day and night. Did that really happen is the question that has puzzled architects and historians for centuries. Documentary filmmaker, Ken Klein, explores how the Pyramid of Giza might have been built. Join Ken Klein in one of the most exciting adventures and revelations of our time.