The Pyramids. Stonehenge. Karnak. Abu Simbel, Hatshepsut’s Obelisk, Machu Picchu, Some of the greatest and most enduring monuments to mankind’s industry, ingenuity and faith. How were they built? What did it take to raise the huge towers of stone from the barren plains of Giza? How could the ancient Inca have carried massive stone blocks weighing many tons dozens of miles to place them with mathematical precision upon one another? The same questions remain for Stonehenge and Karnak. Here is your chance to learn some of the answers and plumb the mind of our inventive and amazing ancestors.