Pyramid of Cheops-Giza-Egypt: It is the oldest and largest of the three pyramids of Giza and it was the tallest man-made structure in the world for over 3,800 years.It is believed it was built as a tomb for Fourth dynasty Egyptian King Khufu (Cheops)over a 20 year period installing approximately 800 tonnes of stone every day that concluded around 2560 BC.
