The Great Pyramid, a 146-metre-high mountain of stone, was created by arranging 2.3 million limestone blocks, each about 2.5 tonnes, with astonishing accuracy.

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Completed around 2650 BC, a century before the Great Pyramid, this is the oldest pyramid of all and one of the most beautiful.

BBC: The perfect trip: Egypt

QUIST-ARCTON: Well, the one that's probably most important to Africa is the Great Pyramid of Giza because it's the - actually, it's the only one that is still standing.

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The Great Pyramid of Giza is an honorary candidate.

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The famous Spalding baseball tour of 1889 to among other places New Zealand, Ceylon, France and Egypt, where baseball players attempted to throw baseballs over the Great Pyramid, was notorious for not fostering an interest in baseball in the countries they visited.

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Several changes later, this is the building that stands on the eastern side of the great glass pyramid.

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Mobile though was the great promise, the unspoken industrial policy, the vision to unseat America at the top of the tech pyramid.

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