Dubai a fantastic city, you can not discribe it, you have to see it. Everythink is bigger, higher and more luxury. The sheiks of the different emirates try to beat each other in spending money. Some of the thinks you can see in Dubai.
Burj Khalifa the highest building of the world (828m).
Burj al Arab the only hotel with seven stars.
Dubai Mall the biggest mall with the biggest Gold-Souk and the biggest aquarium.
The Palm Jumeira.
Dubai Metro the longest autonomously guided rail network.
Sheik Maktoum International Airport in Jebel Ali, maybe the biggest airport.