List of tallest structures – 400 to 500 metres
This is a part of the list of tallest structures in the world, past and present of any type. This list includes quite a few masts. A mast is a man-made support structure, commonly used on sailing ships as support for sails, or on land as radio masts and towers used to support telecommunication equipment such as radio antennas ("aerials" in the UK). Other parts are: See the first part for terminology and general introduction. List by height. indicates a structure that is no longer standing.  List of tallest structures – 400