The Sears Tower (or the Willis Tower, named after the England-based Willis Group Holdings) in the TTS universe in often cited as the spot where people are executed by the evil Linux Anna, or where Microsoft Sam chooses to take a dump with rules by the ROFL robot via error messages.
The tower was utilised in a running gag in the earlier days of Thunderbirds101's videos, though it has fallen into obscurity since then.
Information of the Tower
Height: 1,451 ft (442m)
Location: Chicago, Iilnois