... that's a square 1000 x 1000 meters. Now place 5 "normal" computers next to each other in two layers and you need about 100 000 square meters. Divide 100 000 by 8 data centers (Atlanta, North/South Carolinas, Chicago, California, Oregon, Taiwan, Ireland) = 12 500 square meters per data center. If every data center has 2 floors than you need a building like 80 x 80 x 5 meters. And you still have enough place for the guys with wheelbarrows :) Anyway a data center like this would be about a size of an industry bakery for a slightly bigger town - 100 000 inhabitants. About the same size, about the same power consumption. Nothing spectacular.