Eiffel Tower

Paris, completed 1889. The tower was built for a world's fair, not for radio, but radio is a big part of why it is still standing. From 1903 Captain Gustave Ferrié ran military wireless experiments from the top, and that strategic use helped keep it from demolition. Look at the very tip in this photo: the antenna cluster above the third floor still carries television and FM radio for the Paris region. A DAB+ digital radio antenna lifted into place by helicopter in March 2022 brought the total height to 330 meters.