High Quality Content by WIKIPEDIA articles! These are lists of towers that fall under the definition of a tower which is a tall man-made structure, always taller than it is wide. Towers are generally built to take advantage of their height and can stand alone or as part of a larger structure. Towers as defined here are meant for regular but not living access by humans, and are self-supporting (or free-standing - no guy-wires). Thus continuously habitable buildings and skyscrapers and radio and TV masts do not qualify. The bridges towers (pylons), chimneys, transmission towers, and most large statues allow human access for maintenance, but not as part of their normal operation, and are therefore not considered to be towers. These nonbuilding structures could be found at List of tallest structures in the world.