I found an article related to what I recently reported in my article called Beneath the Pyramids. They found tunnels beneath the Giza plateau which may lead to new discoveries (despite Zahi Hawass saying there was nothing new to find there). This article I found connects it to a prediction of the psychic Edgar Cayce who said there was a "Hall of Records" beneath the Sphinx that would be found one day.
Here is an excerpt:
Edgar Cayce’s Association for Research and Enlightenment reported the following information from their headquarters in Virginia Beach, Virginia on August 25th 2009: Explorer and author Andrew Collins, funded by Edgar Cayce’s A.R.E. Archeological Research Fund, has found and begun exploration of a subterranean network of previously unrecorded chambers and passageways beneath the Giza plateau, home to the Great Pyramid and Sphinx. Collins hopes that his discovery will eventually lead to finding a secret chamber alluded to by the ancient Egyptians as the “Tomb of God,” a structure known more popularly today as the “Hall of Records.”
The trail began in 2002 when the British Museum needed to relocate its library and archives of the Department of Ancient Egypt and Sudan. During the move, the memoirs of Henry Salt, British Consul General in Egypt from 1815 until his death in 1827, were found again. Although previously catalogued, the contents had not been studied in depth. Some extracts were published in the nineteenth century, but it was only when the British Museum reproduced the complete work in The Sphinx Revealed, A Forgotten Record of Pioneering Excavations that full details of Salt’s amazing exploration of “catacombs” under the Giza plateau came to light. Salt, in the company of Italian explorer Giovanni Caviglia, conducted these explorations in 1817, exploring underground tunnels for a distance of “several hundred yards” before entering a spacious chamber that communicated with three others, from which went several “labyrinthick” passages, one of which was investigated by Caviglia for a distance of 300 feet. Although these passages are of natural origin (meaning caves), there are hints that some parts of this subterranean network of chambers and tunnels are man-made, and stretch beneath the plateau on which the Pyramids are located.