In the constant race to the top, people have built taller, better, grander buildings up, up into the clouds. Each new building shoots up out of the ground at increasingly dizzying heights; right now, the Burj Khalifa tower in Dubai is number one, but with constant building going on all over the world, it won't be for long.

Press Start for a look at the top 10 tallest buildings in the world in 2011.