Recent archaeologists have made an intriguing discovery at the site of an ancient Egyptian cemetery located near the famous Giza pyramid complex. This discovery, a mysterious subsurface anomaly, was revealed through investigations conducted using advanced geophysical techniques, including ground-penetrating radar (GPR) and electrical resistivity tomography (ERT). These methods have enabled the detection of potential buried structures, paving the way for new archaeological explorations. Geophysical exploration methods, such as ground radar (GPR), electrical resistivity surveys, and magnetic surveys, are crucial tools in archaeological studies. They allow for the detection of archaeological anomalies buried beneath the surface before excavation even begins, thus facilitating the location of known and unknown archaeological sites, and contributing to their preservation. These methods are constantly evolving. For example, GPR has been used since the 1980s, but survey techniques have improved over time. Initially, surveys were conducted along a straight line, but today, two-dimensional and three-dimensional studies are common. In addition, the integration of satellite positioning systems allows for precise 3D images, which facilitates data interpretation. In Egypt, where many important archaeological sites exist, these techniques are particularly useful. For example, in the Giza region, studies have revealed underground structures around the pyramids and the sphinx. These discoveries were made using techniques such as electrical resistivity and GPR. The western cemetery of Giza, known to be an important burial site for ancient Egyptian royalty, has been the subject of more recent geophysical surveys. Located west of the Great Pyramid, it houses numerous mastabas, subterranean tombs typical of ancient Egypt. These are flat, rectangular structures built of limestone or mud bricks, with a subterranean chamber connected to a vertical shaft. Although most of these sites are buried under sand, geophysical exploration methods allow their exact locations to be determined from the surface. The research team focused their efforts on a flat, vacant area of the cemetery where no aerial structures had previously been identified. These surveys, conducted by a team including experts from the Higashi Nippon International University and Tohoku University in Japan, as well as the National Research Institute of Astronomy and Geophysics (NRIAG) in Egypt, finally revealed a significant anomaly suggesting the presence of previously unknown archaeological structures. Specifically, the archaeologists mention a shallow L-shaped structure located at a depth of up to about two meters and a deeper structure with an area of about ten meters by ten meters that extends up to about ten meters below the surface. According to them, the shallow structure could have served as an entrance to the deeper structure. The nature of the latter is still undetermined, but researchers believe it could be an ancient tomb. However, further excavations will be necessary to confirm this hypothesis and determine the exact nature of what lies beneath the surface. Details of the study are published in the journal Archaeological Prospection.