There have been rumours of passageways and secret chambers surrounding the Sphinx and during recent restoration work several small tunnels have been re-discovered. One, near the rear of the statue extends down into it for about nine yards. Another, behind the head, is a short dead-end shaft. The third, located mid-way between the tail and the paws, was opened during restoration work in the 1920’s, then resealed.
It is unknown whether these tunnels were constructed by the original Egyptian designers, by visiting aliens or were cut into the statue at a later date.
In 1987 a Japanese team from Waseda University (Tokyo), under the direction of Sakuji Yoshimura carried out an electromagnetic sounding survey of the Khufu Pyramid and Sphinx. They reported evidence of a tunnel oriented north-south under the Sphinx, a water pocket 2.5 to 3 m below surface near the south hind paw, and another cavity near the north hind paw.
In 1991 a team consisting of geologist Robert Schoch (Boston University), Thomas Dobecki, and John Anthony West carried out a survey of the Sphinx using seismic refraction, refraction tomography, and seismic reflection. The investigators interpreted their data to indicate shallower subsurface weathering patterns toward the back and deeper weathering toward the front, which they take to indicate that the back of the Sphinx and its ditch were carved by Khafre later than the front. They interpret their data to likewise indicate subsurface cavities in front of the front left paw, and from the left paw back along the south flank.
The strange tunnel!
In 2009, a story emerged of a collapsed illegal tunnel in the Giza village of Nazlet El Smaan, causing the deaths of 6 men. Although very little was made of the story, a selection of photographs and recorded conversations proved that tunnelling beneath the houses was being financed and operated surreptitiously and rumours were surfacing that that major finds were being discovered, including rumours of ancient alien evidence.