Oh no! Not Big Ben! The single British building that has managed to penetrate the American psyche; how would i live without it? And think, we'd miss out on all those fat bastards in Hawaiian shirts coming over and telling us how quaint it was, damn.
But seriously, Big Ben - as with the British ego - is tiny in comparison, it wouldn't be as spectacular in either sense but hopefully it would fall on the Houses of Parliament and crush those bastards.