Towers are tall human-made structures that're almost always taller than they're wide, usually by a significant margin. Towers are generally built to take advantage of their height, and can stand alone or as part of a larger structure. History Towers have been used by mankind since prehistoric times. The oldest known may be the circular stone tower in walls of Neolithic Jericho (8000 BC). Some of the earliest surviving examples are the broch structures in northern Scotland, which are conical… (More on Tower)