Tallest demolished structure
Warszawa Radio mast
Poland (Konstantynow)
The tallest structure ever destroyed or demolished was the Warszawa Radio Mast in Konstantynow, Poland. When it was completed in 1974, it was the world's tallest man-made structure. It collapsed on 8 August 1991 while a construction crew were exchanging a guy wire. It was 646.38 m (2,120 ft 8 in) tall.