Uploaded March 2025 | Updated September 2026, 3 days ago

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Trevor Grassi is an independent researcher, writer, filmmaker, and artist with a deep interest in ancient mysteries, particularly the search for the Hall of Records at Giza. For nearly two decades, he has collaborated with civil engineer and ‘Gizatologist’ William Brown to investigate underground structures near the Sphinx and throughout the Giza Plateau.

Their research has produced ground-penetrating radar scans, photographs, videos, and personal accounts suggesting a subterranean network of tunnels and chambers potentially linked to the record chambers described by Edgar Cayce. They have documented their findings in a three-part documentary series titled “The Secret Underworld of Giza.”

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