The ancient structure known as one of the Seven Wonders of the Ancient World is the Great Pyramid of Giza. Located in Egypt, it is the largest of the three pyramids at Giza and was built as a tomb for Pharaoh Khufu around 2580–2560 BCE. The Great Pyramid is the only surviving wonder of the original seven, showcasing advanced engineering and construction techniques of ancient Egyptian civilization. It originally stood about 146.6 meters (481 feet) tall and is made of an estimated 2.3 million blocks of stone, testifying to the extraordinary skill of its builders.