You're welcome, PurpleMoons. Here is more info that might interest you:
In 1995 workers renovating a parking lot near the Sphinx uncovered a series of tunnels and pathways, two of which dip further underground near the Sphinx. The Egyptian engineer Robert Bauval believes these are ancient and probably contemporaneous with the Sphinx itself.
While examining evidence of erosion, John West's team used a seismograph around the Sphinx. They found evidence of hollow, regularly shaped spaces or chambers a few meters below ground between the paws and to either side of the Sphinx. To date, no further examination has been allowed.
It is very possible there are chambers under or near the Sphinx. Certainly the fantastic discoveries have not come to an end. Witness Kent Weeks' discovery of KV5 in 1989. As excavation has continued to the present, the largest and most elaborate tomb in the Valley of the Kings has been revealed, believed built by Ramses II as a tomb for his sons.