The Great Pyramid of Giza in Egypt is the largest of the original Seven Wonders of the World that is basically stilled in tact. This pyramid is an architectural feat that cannot be duplicated with our modern technology and advanced knowledge. Many, including the Japanese, have tried to build a smaller pyramid to scale, but have not been successful.
This structure has been a mystery and an enigma to mankind for ages. The 5th century (B.C.) Greek historian Herodotus spoke of the Great Pyramid in his writings and put forth his theory of how it was built. He thought 100,000 men over a period of 20 years constructed the pyramid. Many books have been written most within the last 120 years, about the pyramid.