BEIJING AIRPORT Cost a reported 27 Billion Yuan ($3.65 Billion) Took less than 4 years to build During construction had 50,000 workers on site Floor Area 1.3 Million Square Metres Over 4 Km Long Which Makes It The Worlds Largest Building Has an Automated People Mover (A P M) which travels at 80 k/hr Has 84 shops and over 100 restaurants Click
Terminal 3's curved roof contains thousands of skylights. Their orientation to the southeast is intended to maximize the heat gain from the early morning sun, helping to reduce the amount of energy expended by the structure for heating. The golden tint, meanwhile, is meant to evoke the colours of Beijing's Forbidden City, the Ming Dynasty-era imperial palace at the city's centre.
They even provide a runway for those Muslim Pilots with very little experience with landings...!!