Burj Khalifa is the tallest man made structure in the world at 829.8 m (2,722 ft). The architecture reminded me of the Petronas towers in Kuala Lumpur.
Close by you'll find the Dubai Mall, which has a fountain show accompanied by music that's the largest of its kind.
As far as malls go, the Ibn Battuta Mall was actually fairly interesting because of the displays about early age exploration. Ibn Battuta was a Moroccan explorer from the 1300s who traveled over 30 yrs.
Burj Al Arab is the world's only (self proclaimed) 7 star hotel since 1999, because no one else has dared create such ridiculous expectations. Aside from seeing 2 Bugattis ($2mil USD car)valeted in the front, the hotel was a let down. The interior was dated and a bit tacky, and the multicolored panels had the air of lost decade. If you just want to peer inside the hotel, you still need a reservation at the hotel or restaurant to get past the guard. Otherwise you won't even get past the bridge before the hotel( well, unless you're driving a Bugatti, maybe). Smart way to rev up the hype and ensure visitors will be duly disappointed by the decor. We should have cut our losses when we walked in, but we ate at the Sky View Bar. I didn't want to see the surcharge for cancelling a reservation. Service was slow: 2 on a 7 star scale.