The best way to get perspective of how tall the incredible Burj Khalifa is, to jump off it. Fast forward to 4:15 for the jump.
My father lived in Abu Dhabi for 25+ years. We considered moving to Dubai, but decided against it when we learned that many internet dating sites are blocked there. That's not cool. Its certainly not good for business. We'll take a vacation there some time, and visit the Burj. Our favorite tall building is still the Jinmao Tower. Our stay on the 76th floor in 2007 was just breathtaking.