tower - choose a jigsaw puzzle to solve

A tower is a tall structure , taller than it is wide, often by a significant margin. Towers are distinguished from masts by their lack of guy- wires and are therefore, along with tall buildings , self -supporting structures. Towers are specifically distinguished from " buildings " in that they are not built to be habitable but to serve other functions. The principal function is the use of their height to enable various functions to be achieved including: visibility of other features attached to the tower such clock towers; as part of a larger structure or device to increase the visibility of the surroundings for defensive purposes as in a fortified building such as a castle ; as a structure for observation for leisure purposes; or as a structure for telecommunication purposes.Towers can be stand alone structures or be supported by adjacent buildings or can be a feature on top of a large structure or building .