Ancient sites

Who built the Great Pyramid of Giza, when, and how — and do the “lost civilisation”, “aliens” or “much older than we think” claims hold up?

Who built Göbekli Tepe’s megaliths 11,000+ years ago, and does it prove a lost advanced civilisation or a comet catastrophe?

How did people move Stonehenge’s stones hundreds of miles, and is there any truth to Merlin, giants or aliens?