Burj khalifa

The tallest bulding all over the world is Burj Khalifa, previsly called Burj Dubai. You'll find it in the Dubai Emirados Arabes.
Construction began on september 2004 and was opened on january 2004. The architect is Adrian Smith.
It has 165 floors and 823 meters height. His weight equivalent 100000 elephants and need 1000000 liters of water for day. Inside the tower there is hotels, restaurants, officers, mosque, radio station and others.In the world there is just two hotels seven stars and one is on the Khalifa.
I don't know, but I think that should be very expensive go to the Burj Khalifa.