A geophysical survey conducted near Egypt’s Great Pyramid of Giza has uncovered an unusual underground anomaly that archaeologists have yet to identify. The discovery includes an L-shaped structure buried beneath the Western Cemetery and a second feature located deeper underground.
The findings come from a 2024 study led by researchers from Tohoku University, who examined a section of the Western Cemetery that appeared largely unremarkable on the surface. While Giza is among the most extensively studied archaeological sites in the world, the survey shows that hidden features can still emerge beneath the desert sands.
The Western Cemetery lies west of the Great Pyramid and served as a burial ground for members of the royal family and senior officials. The area is known for its mastabas, the flat-roofed tombs associated with elite burials in ancient Egypt. The portion selected for the survey had attracted less archaeological attention because it lacked visible structures above ground.
Advanced Scans Reveal An Unexpected Shape
To investigate the site, the research team combined ground-penetrating radar (GPR) and electrical resistivity tomography (ERT), two techniques widely used to explore buried archaeological remains without excavation.
Ground-penetrating radar sends radar pulses into the ground and records the signals that return after encountering subsurface features. Electrical resistivity tomography measures how underground materials respond to electrical currents, helping researchers identify contrasts between different materials and structures.
The study, published in Archaeological Prospection, identified an L-shaped feature buried approximately 6.5 feet below the surface. Researchers reported that the structure measures about 33 feet in length and appears to have been intentionally backfilled after it was built.
The authors also noted that earlier surveys had detected an anomaly in the northern section of the study area, although its exact form remained unclear at the time. The combination of GPR and ERT provided a more detailed picture of what lies beneath the site.
“The Western Cemetery at Giza is known as an important burial place of members of the royal family and high-class officers,” the researchers wrote in the paper.
Another Structure Appears Deep Underground
Beneath the L-shaped feature, the team detected another anomaly at depths ranging fromroughly 16 to 33 feet. This lower feature stood out because of its high electrical resistance compared with the surrounding ground.
The paper describes two possible explanations for this signal. It could reflect a mixture of sand and gravel, or it could be linked to spaces containing air voids. The available data, though, do not allow researchers to determine which interpretation is correct.
The authors emphasized that the survey results alone cannot identify the material responsible for the anomaly.
“From the survey results, we cannot determine the material causing the anomaly,” they wrote, “but it may be a large subsurface archaeological structure.”
The scans revealed a significant subsurface contrast, but they did not provide enough information to establish its exact nature.
The Discovery Has Not Yet Been Confirmed
The shape of the upper anomaly is one of the reasons researchers believe it is unlikely to be a natural formation. Motoyuki Sato said the geometry of the structure appears too sharp to have formed naturally.
The team proposed that the L-shaped feature may have served as an entrance to the deeper anomaly below. Despite the speculation generated by the discovery, the study does not claim that a tomb has been found. No excavation has yet been carried out, and the authors repeatedly stressed the limits of the available evidence.
Laterheritage-science literature has cited the project as an example of how GPR and ERT can be combined effectively in Egyptian archaeology. Yet the anomaly itself remains unresolved, and no definitive explanation has emerged since the publication of the study.
Researchers have confirmed that something unusual lies beneath this section of Giza’s Western Cemetery. What the L-shaped structure and the deeper anomaly represent will remain a mystery until further investigation is carried out.
