At 451 feet tall, the one named for Khufu at Giza in Egypt is the tallest one of these structures in the world
[DOC] [TLE] The Pyramids of Giza | Jaspa's Journal [PAR] Jun 23, 2015 ... One word immediately comes to mind upon seeing the Great Pyramid ... 
Plundering of its smooth outer casing reduced this to a mere 451 feet high (!)