I have always felt ambivalent about visiting Dubai - I'm pretty sure it would be impossible not to be impressed by some of the structures and facilities, but the history of imported, poorly treated labour that built it is somewhat off-putting. (I'm also disinclined to visit any nation where sorcery is still a crime.)
Anyway, the Burj Khalifa is something that I'm sure I would spend a lot of time looking at, both during the day and at night. They use it for some pretty remarkable light show displays:
Got that via Gulf News.