Edgar Cayce suggested that the Sphinx itself was also built by the Atlanteans, and that it contained hidden chambers and tunnels leading to the Hall of Records.
FWIW: Zawass permitted some drilling in front of the Sphinx and near one of the Pyramids. In both instances the drilling was halted and sealed after hitting Rose Granite - a stone that is not naturally occurring on the limestone plateau. And has to be hauled in from distant quarries.
The inference being that Rose Granite was being used to line tunnels for support.
The history and cavities of the Sphinx are explored by Robert Temple’s the “Sphinx Mystery”; he was given permission to enter and explore by Zwass. He and his wife took many photographs of the exterior and inside the rump utterance.
Put Geraldo on it- he’s not doing anything right now, is he?
Interesting!