The temples of Luxor and Karnak on the west bank and the Temple of Hatshepsut on the east bank of the Nile are simply amazing for the amount of work and effort that was expended creating them. Today, even with cranes and other machinery it would be difficult, but 5000 years ago it was all done by human power. And then followed all the work of painstakingly carving the designs and hyroglyphs. The effort surely dwarfs any construction project of the modern era.