While projects like ScanPyramids look inside the stone structures using cosmic rays, this team used Synthetic Aperture Radar (SAR) combined with micro-seismic data to look deep underneath the Giza Plateau. They were scanning for sub-surface density changes in the solid limestone bedrock.
The radar scans revealed a mind-blowing, highly geometric network beneath the Second Pyramid (Khafre). The data indicates eight massive, hollow cylindrical tubes or wells penetrating vertically into the earth to a staggering depth of 648 meters (2,126 feet)—which is roughly 0.4 miles deep. These tubes are perfectly organized into two parallel rows of four, oriented strictly north-south.
Spiral Pathways and Massive Cubes
The columns aren't just empty holes; the radar mapping indicates each vertical shaft is wrapped in a geometric spiral pathway that leads down to two colossal underground bunkers.
In alternative history, it was long rumored that a "Megalithic Underworld" exists beneath Giza. Mainstream Egyptology dismissed this, claiming any tunnels are just basic, shallow burial shafts dug by Dynastic Egyptians.
The SAR data shows an immense level of engineering. Each of the eight vertical shafts appears to have a spiraling pathway wrapped tightly around its exterior, resembling a giant underground spiral staircase. At the very bottom of their half-mile plunge, these shafts converge into two gargantuan cubic chambers—four shafts draining or opening into one cube, and the other four opening into the second. Each of these subterranean cubes is estimated to be roughly 80 meters (262 feet) wide.
The Djed Resonance Chambers Inside the Pyramid
Directly above these subterranean columns, inside the base of the Second Pyramid itself, the radar detected five evenly spaced vertical cavities that match the shape of the ancient Egyptian Djed column—the mythological backbone of Osiris.
The alignment of these structures suggests the pyramid wasn't built as a tomb, but as a giant mechanical or energetic machine that interacted directly with the deep columns below it.
The researchers mapped five distinct, vertical spaces stacked on top of each other inside the lower core of Khafre's pyramid. They bear a striking resemblance to the "Relieving Chambers" found above the King's Chamber in the Great Pyramid, but their layout perfectly mirrors the Djed Column—an ancient Egyptian symbol representing stability, power, and the literal spine of the god Osiris
The Nile and the Underground Lake Connection
At over 2,100 feet deep, these vertical columns would plunge straight through the local water table, directly interacting with an ancient, rumored subterranean lake system.
For generations, the local inhabitants of the village right next to the pyramids (Nazlet el-Samman) have maintained an oral tradition that a vast, lost lake exists deep underneath the plateau.
Geologically, at a depth of 648 meters, these tubes would cut deeply into the earth's crust far below the level of the River Nile. If these shafts are truly hollow, they would have acted as massive pressure valves or water conduits. When the Nile flooded in antiquity, the water table would rise, forcing water up into these columns.
This has reignited the heavily controversial "Giza Power Plant" theory originally proposed by engineer Christopher Dunn. The theory suggests the pyramids were acoustic or electromagnetic generators, and that water rushing through subterranean chambers was used to create piezoelectric vibrations that were amplified by the specialized granite and crystalline structures inside the pyramids above.