One of Chicago's tallest buildings, close to Lake Michigan, offers the best view of the lake, as well as the city. Days are recommended. There is a sub-project, that is, one side of the viewing platform is equipped with outward tilting devices, visitors can grasp the handrails, as the viewing platform extends outward, overlooking the scenery, daring friends can try. The ice cream on the top floor is also good. Online booking is much cheaper than on-site ticket purchasing, which can be checked directly by two-dimensional code.