Inside, visitors can shop, stay at either of two 1,000-room luxury hotels, go to a skating rink, or even a fake beach or fake Mediterranean village all lit by a fake sun."

"It isn't the world's tallest building — that honor belongs to Dubai's Burj Khalifa; nor is it the largest — that's the Boeing Everett Factory in Everett, Wash. What the New Century Global Center appears to be is the world's biggest building by floor space. Just how big is it?"

"Well, inside it you can fit ...

... 20 Sydney Opera Houses

... 4 St. Peter's Squares, Vatican

... 3 Pentagons"