Explorers document Khufu Pyramid's well shaft: it passes through bedrock to a 'grotto' described as a bubble in aggregate material. Shaft shows varying construction quality—masonry gives way to rough bedrock cut. Grotto may be slowly collapsing from vibrations as tourists walk the Grand Gallery. Material appears artificial, possibly ancient concrete turning to dust. Two natural fissures may traverse the bedrock. A documented 600lb granite block was reportedly stuck in the shaft for decades before falling into the grotto.
Great Pyramid Well Shaft and Grotto Exploration Findings

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Key facts
- The well shaft starts from the bottom of the descending passage and goes through bedrock to the grotto
- The grotto is described as a bubble in aggregate material that is slowly collapsing
- The floor is rising and ceiling falling due to vibrations from tourists walking in the Grand Gallery
- Material in the grotto appears artificial - possibly ancient concrete now decomposing into powder
- The shaft passes through two natural fissures in the bedrock
- First fissure contains cave formations and bats; second fissure is packed with pebbles
- Masonry portion of the shaft is beautifully cut and square; bedrock portion is rough cut
- The ascending passage plug blocks may have served as an emergency exit mechanism
- A 600lb granite block was documented stuck in the shaft for decades before falling into the grotto
Sources
The draining of the Great Pyramid's inclined wellmilleetunetasses.com
Operating diagram of the Great Pyramid of Khufu, showing the mostly flooded inclined well and its fortified lower part that was only ...
(PDF) GREAT PYRAMID of KHUFU: OPERATION & EXPLANATION ...academia.edu
This is a brief paper to disclose a theory by the author of what might have been the operation of the internal workings of Khufu Great Pyramid.
The Shaft or Well - The Khufu Pyramidkhufupyramid.dk
A peculiar passageway called the "shaft" or "well shaft" consisting of different passages hereunder a so called "grotto".
[PDF] Explaining the Shafts in Khufu's Pyramid at Giza - Harvard Universitygizamedia.rc.fas.harvard.edu
The Temple ofEdfu: a Guide by an Ancient Egyptian Priest (C. Karcher) ... It is from this cosmic source that water pours down into the shafts of Khufu's pyramid, ...
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