More ideas from Ndaru
Check out Beijing's new airport terminal by Zaha Hadid: 700,000 square meters (173 acres!) in total, with an 80,000-square-meter ground transportation centre. It kind of looks like the mother of New Mexico's spaceport, from where Virgin Galactic operates:

The world's largest airport terminal planned for China Designed by Zaha Hadid, the forthcoming Beijing International Airport Terminal 1 is almost double the size of Heathrow Terminal 5 and will serve passengers each day