Question: Which is More Impressive - the LHC, Burj Dubai Tower, the ISS or the Pyramids?

All of the news surrounding the Large Hadron Collider and the Burj Dubai Skyscraper recently has got me thinking about large-scale technological projects. Both absolutely defy belief, but which one do you think is the most impressive achievement? I'm even going to throw in the International Space Station for good measure. How about the pyramids? Why not—might be a good idea to have some historical balance.

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