A radar engineer said he has found compelling evidence to support claims around a vast underground complex stretching nearly 3,500 feet beneath Egypt’s Giza Plateau
00:16, 09 Dec 2025Updated 01:37, 09 Dec 2025
Tourists ride camels near the Pyramid of Khafre (Chephren) at the Giza Pyramids(Image: AFP via Getty Images)
A team of Italian scientists stunned the world last March when they announced the discovery of a vast underground complex stretching nearly 3,500 feet beneath Egypt’s Giza Plateau, connecting chambers said to be the size of city blocks.
And now Filippo Biondi — the radar engineer behind the imaging technique — has come forward with what he says is compelling evidence.
In a recent appearance on Jesse Michels’ American Alchemy podcast, Mr Biondi revealed that four independent satellite operators —Umbra, Capella Space, ICEYE, and Italy’s Cosmo-SkyMed — each produced matching raw tomography data indicating the same subterranean structures.
Mr Biondi said: “All four satellites produced exactly the same results. That’s truly remarkable. We can’t announce anything without these fundamental scientific checks.”
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Filippo Biondi (second right) is pictured alongside other experts in the field
Using a technique he pioneered — synthetic aperture radar Doppler tomography — Mr Biondi’s team analyses microscopic vibrations on the Earth’s surface. According to him, these vibrations carry acoustic “fingerprints” from objects thousands of feet underground, enabling software to reconstruct 3D images even though the radar signals never actually penetrate the soil.
The scans, he claims, depict eight enormous hollow cylinders descending vertically from the base of the Khafre pyramid, the middle of the three great pyramids. Each shaft supposedly contains a central column wrapped in precise helical coils and ends more than 3,500 feet beneath the plateau in cubic chambers measuring roughly 260 feet on each side — larger than many modern sports arenas.
Mr Biondi insisted: “The pyramids are just the tip of the iceberg. They’re merely a capstone to something much larger beneath the surface. The real structure is below.”
When asked whether the spiral forms might be natural geological features, he responded emphatically: “Not a chance. It’s man-made. You simply don’t see perfect coils like this occurring in geology.”
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Many mainstream experts, however—including prominent Egyptologist Dr. Zahi Hawass—have dismissed the claims as “fake news” since they first surfaced in the spring. Hawass has argued that the radar-based method cannot possibly image the depths described by the Italian team.
Despite the criticism, the researchers say they remain undeterred, claiming to have detected similar—though smaller—signatures beneath the third pyramid, Menkaure, as well as a single large shaft beneath the Sphinx.
Identical spiral-shaft geometry was also detected 30 miles away at Hawara, the site ancient writers called the Labyrinth. The Giza complex consists of three pyramids, Khufu, Khafre and Menkaure, built 4,500 years ago on a rocky plateau on the west bank of the Nile River in northern Egypt. So far, the team has measured a depth of over 3,280 feet, more than half a mile down.