Khafre's Pyramid, or the 2nd Pyramid, is easily recognisable by the layers of its original casing stones that still remain near its summit and this, along with the fact that it actually stands on a higher part of the plateau, gives the impression that it is taller than the Great Pyramid. An optical illusion, as it is only 136m tall, with sides of 214.5m ,a surface area of 11 acres and an angle of 53 degrees. It also has lost some of its original height through the years, once being 143.5m tall.