The Great Pyramids of Egypt are some of the most famous structures in the world. Built over 4,500 years ago, these massive stone tombs were created for the pharaohs, who were the kings of ancient Egypt. The largest pyramid, known as the Great Pyramid of Giza, was built for Pharaoh Khufu and is one of the Seven Wonders of the Ancient World. These pyramids were constructed using millions of limestone blocks, and their precise alignment with the stars shows the advanced knowledge of the ancient Egyptians in mathematics and astronomy. Today, the Great Pyramids continue to attract millions of visitors, who marvel at their size and historical significance.