At 451 feet tall, the one named for Khufu at Giza in Egypt is the tallest one of these structures in the world
Before Burj Khalifa, the title of "
world's tallest ... For thousands of years, the Great Pyramid in Egypt was the 
tallest structure in the world ... with the Great Pyramid of Giza, at an original 
height of 146.5 metres (481 ft), being the ...