In 1877, Dr. Joseph Seiss made a mind-numbing discovery. He made some calculations and according to them, the Great Pyramid of Giza lies where the extended lines of latitude and longitude intersect. In simpler words, it is located at the end center of the Earth.
Did the Egyptians know? But how could they? But could they? This is another unsolved mystery when it comes to the pyramids and Egyptians.