Bold claim: the Giza pyramids are just the tip of a much larger, hidden megastructure saga beneath the desert. That’s the premise authors and researchers in a recent wave of stories are pushing, arguing that a vast subterranean network lies thousands of feet below the Giza Plateau and connects chambers the size of city blocks. If true, this could rewrite what we think we know about ancient Egypt and its monuments.
A team led by Italian radar expert Filippo Biondi has shared what he calls convincing proof. In interviews on the Jesse Michels podcast American Alchemy, Biondi described four separate satellite operators — Umbra, Capella Space, ICEYE, and Italy’s Cosmo-SkyMed — each producing identical raw tomography data that allegedly map the same underground formations. He emphasized that all four satellites yielded the same results, insisting that these checks are essential before public announcements can be made.
The core of the claim rests on a method Biondi developed called synthetic aperture radar Doppler tomography. By analyzing minute surface vibrations, the team contends that acoustic “fingerprints” from structures deep underground can be extracted. This approach, they argue, allows them to build 3D reconstructions without the radar directly penetrating the earth’s crust.
According to the team, the scans reveal eight massive hollow cylinders extending vertically from the Khafre pyramid’s base. They describe each shaft as containing a central column wrapped in tightly wound helical coils, with endpoints reaching more than 3,500 feet below the plateau into cubic chambers about 260 feet on each side — spaces that would be enormous by any sport-venue standard.
Biondi asserts: the pyramids are only the surface layer of something far grander beneath. He characterizes the underground as the real, larger structure waiting to be understood.
Not everyone is convinced. Prominent Egyptologists, including Zahi Hawass, have dismissed the claims as "fake news" and have argued that radar-based methods cannot realistically image at such depths. They caution that the interpretations may not withstand rigorous scientific scrutiny.
Despite the skepticism, the researchers report additional patterns beneath the third pyramid, Menkaure, plus a substantial shaft beneath the Sphinx, and even a similar spiral-shaft pattern located about 30 miles away at Hawara, historically associated with the Labyrinth. The claim is provocative: could Giza be the gateway to a hidden city or network that reshapes our understanding of ancient civilizations?
The Giza complex itself comprises three pyramids — Khufu, Khafre, and Menkaure — built roughly 4,500 years ago on a rocky plateau along the Nile’s west bank in northern Egypt. The team says their measurements already reach depths beyond 3,280 feet, surpassing half a mile underground.
Whether these discoveries prove anything remains hotly debated. What’s clear is that the idea of enormous underground structures beneath Giza challenges conventional archaeology and invites vigorous discussion about how far technology can push our knowledge of ancient sites.
