The document discusses pyramids, noting that Egypt has more pyramids than any other country. It specifically describes the Great Pyramid of Giza, the oldest pyramid in the world located near Cairo, which stands 146.5 meters tall and was built as the tomb of Pharaoh Khufu. The pyramids were constructed to serve as tombs for kings and pharaohs, with the three large pyramids at Giza built for Khufu, Khephren, and Mycerinus. Large pyramids also exist in other parts of the world, like Guatemala.