For 4,500 years, the Great Pyramid of Giza has guarded secrets within its stone walls. But in 2017, a team using cosmic-ray Muon Tomography discovered something impossible: a massive "Big Void" at least 30 meters long, hidden directly above the Grand Gallery. Unlike the King’s or Queen’s chambers, this space has no known entrance and has never been touched by human hands. Is it a structural necessity, a secret treasury, or the true resting place of Khufu? This short documentary explores the latest discoveries from the ScanPyramids project and the technology revealing the lost history of the world's last standing ancient wonder. Subscribe to Legends and Ruins for more lost history and ancient mysteries. #GreatPyramid #AncientEgypt #HiddenChambers #LostHistory #MuonTomography #Giza #PyramidSecrets #Archaeology #HistoryShorts #LegendsAndRuins #AncientEngineering