The Sears Tower, at one point, was iconic enough to be associated with Chicago automatically. Then in the 2000's, Sears was forced to sell the tower to a British investing firm, which renamed it the Willis Tower. Then, after the Great Cape Crusades, the Willis Tower was bought by the Defenders of Humanity for the use of their Chicago based team. It is here that ours heroes are located, the building refitted to provide the latest in ultratech security. There are numerous entertainment rooms, training facilities, and labs for it's varied residents. There is also an interim holding facility, where crooks are held until the DoH can pick them up.