If you follow the precession of the Earth (the slow wobble of the Earth over thousands of years around the North Star) you will notice that the Sphinx points right to the constellation Leo on the SPRING EQUINOX of every year back around 12,500 years ago (10,500 BC)
These ancient sites have been rebuilt MANY times, following the ancient blueprint of the original creators of these monuments, so they are VERY ancient indeed. Today the Sphinx currently points to Taurus, the Bull, every spring equinox. So why is the Sphinx not a bull? Because it was most likely built in 10,500 BC, not 4-6000 years ago.
In a series of expeditions between 1991 and 1993 led by John Anthony West, and independent Egyptologist, scientific investigators conducted geological and seismic surveys around the Great Sphinx of Egypt. The chief geologist was Dr. Robert Schoch, Professor of Geology at Boston University, and the chief seismologist was Thomas Dobecki from the highly-respected Houston consulting firm, McBride-Ratclif & Associates.
Their conclusions: The pattern of erosion on the Sphinx indicates that it was carved at the end of the last Ice Age, when heavy rains fell in the eastern Sahara - perhaps more than 12,000 years ago. This contrasts starkly with the 'orthodox' Egyptological dating for the Sphinx of around 4,500 years ago.