> The Sears Tower is actually a 3x3 grid of individual towers, connected in a way that allows for lateral motion. This mimics a palm's trunk structure. If you

> The Sears Tower is actually a 3x3 grid of individual towers, connected in a way that allows for lateral motion. This mimics a palm's trunk structure. If you are easily frightened, do not go up to the top on a windy day. It sways in the wind like a palm tree (side-to-side 10-15 feet, 3-4 meters). And the creaking noises! If you close your eyes, it is easy to imagine that you are in a tall ship 150 years ago.