There are many pyramids around the world. The most famous are the pyramids of Giza in Egypt (shown above). The pyramids of Menkaure, Khafre and Khufu (from left), erected on the west bank of the Nile were built between 2575-2465 BC for three Egyptian kings.
The pyramid of Khafre is located beside Khufu's "Great Pyramid" at Giza. These pyramids are being scanned by members of the Scan Pyramids project. Using thermal imaging, radiography and 3D reconstruction, the team is gathering data on the Great Pyramid of Khufu, the pyramid of Khafre, and two pyramids built by the pharaoh Snefru at Dahshur. These are called the Red and Bent pyramids.
The first and the largest Giza pyramid was built by the pharaoh Khufu. He reigned from about 2551 to B.C.). His pyramid stands 455 feet (138 meters) tall.