My wonder is the Burj Khalifa tower in Dubai. I've stood on 124th floor, on the observation platform, and from there everything seemed so small in comparison - even the bigger towers. From afar the Khalifa seemed like just another expansive emirate building and I wasn't so sure about it, but up close you can truly feel what an achievement it is. I wasn't expecting to be so impressed. It's an awesome feat of engineering. I went up in the lift, at a speed of about 10m/s, and my ears popped twice.
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