What is the largest building in the world?

How to define what is the largest building in the world? The meaning of "large" can for sure means different things. The Video clip below shows some different example of what can be the biggest building depending on definition.

Three of the mentioned constructions is located in China. The Great Wall is of curse the longest one, but the other two is maybe not so expected. Casino Venetian in Macao in the biggest building if you calculate floor space, and the biggest structure based on surface area is the new Terminal 3 to Beijing's International airport. When you are standing in the long taxi zone outside the check in counters it is hard to see the end - and then you are standing at the short edge. The design of the terminal is inspired by a dragon.

Beijing Internationa Ariport Terminal 3 - Dragonstyle from above

The entrance to Terminal 3 from inside.

One, for me, highly interesting category in this subject is "The highest building in the world". The highest building in China, Shanghai World Financial Center, with its 492 meter in number 2 of completed buildings today, but will soon drop down to place 5 because several new high object will be completed during 2010. Burj Dubai will take the first place with incredible 818 meters. China has never hold the title of "The highest building in the world" but have many places in the top list. Of todays 20 highest buildings in the world, 11 are located in China.