World Trade Center
Ah, the Waystar Royco battleground - um, offices. Where else would they be but the World Trade Center, among fellow media conglomerates? Some of the filming was done inside vacant spaces at World Trade Centers 4 and 7. Carter even imagined a little back story as to why they'd be there, as he explained in a behind-the-scenes video. "We imagined that the company maybe moved in there after 9/11 and got a foothold in when things were inexpensive and the city was recovering."
[Photo via HBO]