Located on the Giza plateau, on the western bank of Egypt’s Nile River, the Great Sphinx stands guard. Carved out of a large block of limestone, the impressive monumental sculpture is often regarded as one of the largest and oldest monuments in the world and is perhaps as impressive as the pyramids of Egypt. Despite being older than old, and although experts have studied and surveyed it for more than 200 years, we have still not solved the riddle of the Sphinx. The monolithic monument refuses to give up its secrets. We’ve still not been able to firmly conclude when the statue was carved, who it was commissioned by, and its original purpose.