The Egyptian pyramids are ancient pyramid-shaped masonry structures located in Al Giza, Egypt.

Constructing the pyramids involved moving huge quantities of stone. In 2013, papyri discovered at the Egyptian desert near the Red Sea by archaeologist Pierre Tallet revealed the Diary of Merer, an official of Egypt involved in transporting limestone along the Nile River. These papyri reveal processes in the building of the Great Pyramid at Giza, the tomb of the Pharaoh Khufu, just outside modern Cairo.

Rather than overland transport of the limestone used in building the pyramid, there is evidence—in the Diary of Merer and from preserved remnants of ancient canals and transport boats—that limestone blocks were transported along the Nile River. It is possible that quarried blocks were then transported to the construction site by wooden sleds, with sand in front of the sled wetted to reduce friction. Droplets of water created bridges between the grains of sand, helping them stick together.