Hiiiighest Structures in the World?

After googling "The Highest Structure in the World", I found a tremendous tower called Burj Khalifa located in Dubai. As of now, it is the tallest man made structure at 828m in height. This building of this amazing structure began in 2004 and finished in 2009. Overall, the structure takes the shape of a triangle; large on the bottom and getting smaller and smaller towards the top. The reason for this is probably to effectively balance the giant tower. This design also allows the main center balance to be near the middle and bottom portion of the tower.