Mystery of Egypt’s Giza pyramids deepens as hidden megastructure 4,000 feet below is revealed
Joe Rogan’s latest podcast guest reviewed controversial scans showing a massive underground structure beneath the Great Pyramid of Giza, potentially rewriting ancient history.
The scans were carried out by Italian scientist Filippo Biondi and his Project Khafre team using synthetic aperture radar. This satellite imaging technology maps subsurface features by reflecting radio waves off the ground.
More than 200 scans from multiple satellites, including Italy’s Cosmo-SkyMed and U.S.-based Capella Space, showed uniform results pointing to massive pillars about 65 feet in diameter wrapped in spirals and submerged to a depth of nearly 4,000 feet.
These columns appear to end in 260-foot cubic chambers below the three pyramids and the Sphinx; Biondi describes it as ‘huge rooms’ measuring roughly 260 feet in length and width.
The scans also highlighted shafts that went down about 600 meters and were intersected by horizontal corridors about 3 meters high; This led Biondi to speculate that the pyramids might not be tombs but rather ancient power plants or vibration devices for out-of-body experiences.
Rogan echoed the radical insinuation, saying: ‘These are not tombs’ and added that if the data were correct, the pyramids could be ‘just the tip of the iceberg’.
Biondi dated the underground structures to between 18,000 and 20,000 years ago, connecting them to Zep Tepi, the legendary ‘First Time’ when the gods first reigned and civilization began.
He also pointed to salt deposits from ancient seawater floods as evidence of a major flood event that could support the theory that a much older civilization existed beneath Giza.
The research team published a model of the structures hidden beneath the Giza plateau, including three pyramids and the Great Sphinx.
Italian scientist Filippo Biondi was the latest guest on the Joe Rogan Experience, where he described scans showing the hidden megastructure
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.
But the Pyramid of Khafre team believes the structures are much older and hide an underground world built by a lost civilization.
The main reason for the controversy is the reliability of the technology, which Biondi said he developed through “top secret projects for the Italian military” and applied to places such as the Mosul Dam and Italy’s Grand Sasso laboratory.
Although patented, peer-reviewed and precisely designed, when the scans are applied to Giza, the reactions are harsh. Mainstream archaeologist Dr. Zahi Hawass described the scans as ‘These are bulls***’.
Biondi admitted that he and Armando Mei, who was part of the team, initially doubted the data, hiding the results for six months and suspecting that artifacts were being manipulated.
‘My thought was that this wasn’t real. “I was thinking it might be noise or some artifacts due to our processing procedures,” he said.
The confirmation came from multiple satellite systems and benchmarks, including full mapping of Italy’s Grand Sasso particle collider, located about 4,600 feet deep inside a mountain.
Biondi said it was the consistency between the datasets that convinced him the findings were real.
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Scans capture enormous shafts descending from pyramids
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.
Initially relying solely on Italy’s Cosmo-SkyMed satellites, the team expanded its analysis to include US-based Capella Space satellites and others, seeking confirmation through a diversity of sources.
‘When we got the same results using American satellites and always got the same results with other satellites, we decided to announce it,’ he said.
In total, more than 200 scans returned the same structural patterns.
Rogan noted that the technology has already been validated elsewhere; this includes the ability to precisely map Italy’s underground Gran Sasso laboratory, a particle physics facility buried nearly 4,600 feet deep in a mountain. ‘
“We know it’s true, we know it works,” Rogan said, describing resistance to the findings as “confirmation bias.”
Biondi emphasized that his work did not involve penetrating the ground with radar beams, a common criticism online.
Hawass used this argument to refute the claims, telling the Daily Mail: ‘They used topographic radar.
‘They claim it landed more than 300 meters into a city. But any scientist who understands tomographic radar knows that radar only reaches 60 feet. Their theory is completely wrong.’
However, Biondi explained that the method analyzes mechanical vibrations naturally present at the Earth’s surface and reconstructs subsurface features through tomographic inversion.
‘We’re not penetrating anything,’ he said. ‘We’re just capturing the entropy at the Earth’s surface.’
The scans showed not only vertical structures but also horizontal corridors roughly three meters high connecting wells and chambers beneath the plateau.
Scans also captured large chambers beneath the shafts
After collecting the data, the researchers used a special algorithm that converted the information into vertical images of the ground beneath the pyramid, capturing the first glimpse of hidden structures. The picture shows eight wells under the pyramid
According to Biondi, existing wells between the pyramids, which are now blocked by debris, may already be providing access points to the underground system.
‘These shafts go down, down, down… and they reach the chambers below,’ he said, estimating a depth of about 1,968 feet.
Biondi argued that physical excavation may not even be necessary to confirm the findings.
He proposed a project to Egyptian officials that would focus on clearing debris from existing wells and deploying robotic drones rather than digging new tunnels.
‘We want to use machines, not people,’ he said, estimating the cost of such an effort at about $20 million.
Rogan repeatedly returned to the dimension of consequences. If the data is confirmed, he said, the pyramids, long considered among humanity’s greatest architectural achievements, may be merely visible remnants of something much larger.
“These massive structures that have baffled humanity forever are just the tip of the iceberg,” Rogan said.
Biondi agreed with this view and emphasized that the measurements are the only underground data currently available for the Giza Plateau.
‘What we found is something that is confirmed by our measurements,’ he said. ‘This is the only data we have at the moment.’
Despite the controversy, Biondi said he welcomes replications by other research groups and is open to review.
‘I’d be happy if someone could copy something,’ he said. ‘I would be happy if other research groups could replicate what I have shown.’
For now, the scans have not been confirmed by direct discovery and remain suspended between radical possibility and entrenched skepticism.
But as Rogan points out, it would be a mistake to ignore the data outright. ‘If you’re skeptical, we should probably investigate,’ he said. ‘And if it’s wrong, okay. But if it is true, it is a crime not to investigate.’
