Archaeologists and Egyptologists found a tunnel at the very back of the Sphinx. The top of the head once had a hollow cavity cut into it. And there is a wide crack in the bedrock towards the back of the Great Sphinx that was once believed to contain a burial.

The Great Sphinx of Giza is fundamentally a solid monument carved directly from the natural limestone bedrock of the Giza Plateau; however, it is not "completely" solid in the sense of a uniform block. Over thousands of years, archaeologists have identified several hollow shafts, tunnels, and natural fissures within and beneath the structure. Notable examples include the "Rump Passage" at the rear and a vertical shaft on the Sphinx's back that was likely explored by early treasure hunters. In 2026, while the "Hall of Records" theory remains a popular myth in alternative history, scientific scans using ground-penetrating radar have only confirmed smaller voids and ancient repair work rather than large hidden chambers. The head and the majority of the lion's body are solid stone, but the presence of these narrow passages—some natural and some man-made—continues to fuel archaeological intrigue about how the ancients interacted with this massive sentinel of the desert.