Muon study of the Great Pyramid
http://www.freerepublic.com/focus/chat/3600878/posts
http://www.freerepublic.com/focus/chat/3600940/posts
https://www.freerepublic.com/focus/news/3601181/posts
https://www.freerepublic.com/focus/chat/3602141/posts
http://www.freerepublic.com/focus/chat/3613749/posts
maybe not:
Great Pyramid’s hidden chamber may be a trick of perspective, Egyptologist warns
https://www.news.com.au/technology/science/archaeology/great-pyramids-hidden-chamber-may-be-a-trick-of-perspective-egyptologist-warns/news-story/d02e9021caf6233a265c0d84b7277812
From theories about electromagnetic waves and frequency generation to make crops grow, to being an irrigation pump, to being some sort of sound resonance healing center, to being a tomb (no wall decorations, tho - strange), the Giza pyramid is definitely a wonder to wonder about.