The Great Pyramid of Giza remains a mystery.

The Great Pyramid of Giza, the oldest and largest of the three pyramids in Giza, Egypt, is a marvel of ancient engineering. Built over 4,500 years ago, it has puzzled researchers with its precise construction and alignment with the cardinal points of the compass. The pyramid is made up of approximately 2.3 million limestone blocks, some weighing up to 80 tons. Despite extensive study, many aspects of its construction and purpose, such as how the massive stones were moved and precisely placed, continue to spark debate and speculation among historians and archaeologists.