Anomalies in the Great Pyramid: What Is Confirmed and What Isn't

Two entirely different types of reports circulate on this topic, and they are regularly conflated.

One type appears in academic journals; it is peer-reviewed and describes two voids that actually exist. The other type appears in headlines, describing underground cities, shafts several hundred meters deep, and columned halls, but is based on no published measurements.

Both discuss hidden chambers in the Great Pyramid, and both use words like scan, radar, and anomaly. The difference lies not in vocabulary, but in whether the data has been made public.

This page separates them. First, we look at how to examine a structure of six million tons of stone without damaging it. Then we cover the two findings that are confirmed. Next, we address the reports that are not. Finally, we look at what comes next.

For those in a hurry: Yes, there are currently unknown voids. No, no one has been inside them yet, and nothing has been found inside them so far.

X-rays don't work, muons do

Before discussing findings, a common misconception must be dispelled: There is no and cannot be a radiographic scan of the Giza pyramids in the sense of an X-ray image.

X-ray radiation is completely absorbed by a few centimeters of rock. For a structure whose wall thicknesses are measured in tens of meters, nothing reaches the other side. Similarly, Lidar does not help with the Giza pyramids, although the term often comes up in this context: Lidar scans surfaces with laser pulses and creates a very accurate terrain model from them. It cannot see through stone. It is excellent for measuring exterior surfaces but useless for voids inside.

What works comes from outer space. When cosmic radiation hits the upper atmosphere, muons are created—heavy relatives of the electron. They rain continuously onto the Earth's surface, at a rate of tens of thousands of particles per square meter per minute, and they penetrate rock. On their path, they lose energy, and the more material they pass through, the more energy they lose.

This yields a measurement principle of striking simplicity. Detectors are placed in existing chambers and corridors, counting for months how many muons arrive from which direction, and comparing this with the expectation for solid masonry. If more arrive from a certain direction than expected, there is less material there. A void thus casts a shadow in the opposite direction.

This is backed up by diversity. Several detector types are used, based on different physical principles: films where particle tracks become chemically visible, electronic counting arrays from scintillators, and gas-filled chambers. They were operated by various institutes, evaluated independently, and only then compared. If three types at three locations show the same anomaly, equipment error is practically ruled out as an explanation.

The price for this is time. A robust measurement takes months, and the resolution is sufficient to recognize a room, not to say what lies within it. This is precisely why the findings are formulated cautiously, and this is precisely why they are called voids and not chambers.

Two findings that passed scrutiny

Two findings have passed scrutiny, and they are understood to very different degrees.

The first is a large void above the Grand Gallery, published in 2017. Measurements from three detector types at various locations independently arrived at the same result: Above the gallery lies a space at least thirty meters long. Whether it runs horizontally or diagonally, whether it is a single room or a chain of smaller ones, remained open. The publication on this explicitly describes it as a void without making statements about function or content.

The second finding is now the better documented one. Behind the angled blocks over the original entrance on the north side lies a corridor about nine meters long. It became visible in the data starting in 2016, was described in more detail in 2023, and confirmed in a peer-reviewed paper in 2025.

It is interesting how this confirmation came about, because it shows what is possible without damage. Three independent methods and their image fusion were used: ground-penetrating radar scans of the Giza pyramids, ultrasound, and electrical resistance tomography. All three traced the same outline. Additionally, a six-millimeter-diameter endoscope was pushed through an existing joint between two blocks. With this, the space was seen for the first time in four and a half millennia.

What these spaces were intended for remains unanswered. For the corridor on the north side, the sober interpretation is likely: The angled blocks above channel weight sideways, and a void behind reduces the load on the original entrance. For the large void above the gallery, something similar is suspected, supplemented by the possibility that it consists of remnants of an abandoned construction phase. Both are structural explanations, and both are unproven. What is certain is existence, not purpose.

What the camera showed was unspectacular yet important: an empty corridor with raw floor and a corbelled vault. No offerings, no inscriptions, no sarcophagus.

The 2025 Radar Report

In March 2025, a completely different report went around the world, and it serves as a cautionary tale.

A group claimed to have found an extensive facility under the middle structure using satellite radar: several identical structures at the base, connected by paths, along with vertical shafts said to reach several hundred meters into the depth. The numbers were announced at a press conference and spread across news sites and social networks within days.

What was missing was publication. To date, no peer-reviewed paper exists documenting these results, and the method used is unsuitable for this purpose: The procedure evaluates satellite radar that scans the Earth's surface and penetrates only a few meters into dry soil, not several hundred. Independent checks of the claim concluded that there is no robust basis.

Addendum from August 2026: The paper in which the same group described its radar method in 2022 was retracted by the journal on August 10, 2026. The editorial board cites serious methodological flaws and statistical errors following an review; the authors contest the decision. Thus, the 2025 claims also lack the methodological foundation they had relied upon.

Notably, who objected. Not only European and American experts, but the Egyptian Antiquities Authority itself publicly stated that there is no scientific basis for columned halls under the middle structure and that no mission is working there currently.

Why such things gain traction anyway has little to do with Egypt. A number like six hundred forty-eight meters depth sounds precise and is therefore more convincing than a cautious expert formulation with an error margin. Furthermore, the serious findings themselves are already astonishing: Anyone who read that an unknown void was indeed detected in 2017 will find the next report plausible. The real finds make the false ones credible.

The case shows the pattern that recurs again and again on this topic. A press conference replaces a publication, a large number replaces an error statement, and reporting adopts both unchecked. Anyone wanting to contextualize reports on this structure needs only one question: Where are the data?

What Is Announced Next

The question remains how things proceed, and caution is warranted here.

In November 2025, a prominent Egyptian archaeologist announced at a book fair that a discovery would be presented in 2026 opening a new chapter. Reports mentioned a robot standing at the end of a corridor before a closed stone door. There is no scientific publication on this, and the phrasing comes from a lecture, not a peer-reviewed journal.

This does not have to be false. Announcements of this kind have both been confirmed and fallen flat in the past. Treat it as what it is: a statement of intent by a single person, not a publication. Should a door actually be opened, it will not go unnoticed.

A different scenario is more realistic. Both known voids were found using non-destructive methods, and further voids can be found using the same methods. The next step is therefore likely not an opened door, but a better map: higher resolution, more measurement points, more precise outlines.

For readers, there is a simple distinguishing feature that requires no expert knowledge. A peer-reviewed publication always names three things: the method used, the error margin of the measurement, and the names of the institutes involved. If any of these is missing, it is a communication, not a result. This check takes thirty seconds and reliably filters out most reports on this structure.

And even if a room were opened, expectations should be tempered. The structure was emptied in antiquity, broken into during the Middle Ages, and examined hundreds of times since. An untouched room with contents would be a sensation precisely because it contradicts everything found so far.