«Imprisoned with the Pharohs» by Howard Lovecraft

The narrative tells a fictionalized account in the first-person perspective of an allegedly true experience of escape artist Harry Houdini. Set in 1910, in Egypt, Houdini finds himself kidnapped by a tour guide, who resembles an ancient pharaoh, and thrown down a deep hole near the Great Sphinx of Giza. While attempting to find his way out, he stumbles upon a gigantic ceremonial cavern and encounters the real-life deity that inspired the building of the Sphinx.