The pyramids are ancient masonry structures in Egypt, most famously the Giza pyramid complex, which includes the pyramids of Khufu, Khafre, and Menkaure. Built around 4,500 years ago during the Old Kingdom, they served as tombs for pharaohs, designed to protect their mummified bodies and treasures for the afterlife. The most famous is the Great Pyramid of Khufu, which was once the tallest structure in the world and remains the only one of the Seven Wonders of the Ancient World still standing.