The Well Shaft and Grotto: A 55-Metre Vertical Tunnel Through Bedrock

THE WELL SHAFT OF THE GREAT PYRAMID

A roughly vertical shaft approximately 55metres long connecting the Grand Gallery area (near the junction with the Ascending Passage) to the Descending Passage below.

UPPER SECTION (~28m):

• Begins near the junction of the Ascending Passage and Grand Gallery
• Descends through the pyramid masonry into the bedrock
• Width: ~0.78m (1.49 cubits)

THE GROTTO:

• A natural cave in the bedrock encountered by the shaft
• Irregular shape, approximately 4m across
• Contains ancient masonry repairs
• May be a remnant of the original survey/construction tunnel
• Located approximately at the base level of the pyramid

LOWER SECTION (~27m):

• Continues from the Grotto down through solid bedrock
• Connects to the Descending Passage ~97m from the pyramid entrance

PURPOSE:

The conventional explanation is an escape route for workers who sealed the Ascending Passage with granite plug blocks from above. After placing the plugs, workers would have descended through the Well Shaft to exit via the Descending Passage.

However, the existence of the natural Grotto raises questions. The builders specifically routed the shaft through this pre-existing cave. This may indicate the cave was known and significant before construction began — possibly a sacred site, a geological survey marker, or a natural acoustic resonance chamber in the bedrock.