Cartão Postal Willis Tower

Once the tallest building in the world, the Willis Tower (formerly Sears Tower) dominates the Chicago skyline with its stepped black silhouette. The Skydeck on the 103rd floor offers 'The Ledge,' where visitors can stand on glass balconies over the city. The tower is a triumph of bundled-tube structural engineering. Its presence defines the 'Windy City' and provides a focal point for the massive metropolitan sprawl reaching toward the horizon.