<page_title> List of tallest buildings and structures </page_title> <section_title> Tallest destroyed structures by category, not surpassed by existing structures </section_title> <table> <cell> Guyed mast <col_header> Category </col_header> </cell> <cell> Warsaw Radio Mast <col_header> Structure </col_header> </cell> <cell> Poland <col_header> Country </col_header> </cell> <cell> 646.38 <col_header> Height (metres) </col_header> </cell> <cell> Completed in 1974, collapsed on August 8, 1991 <col_header> Remarks </col_header> </cell> </table>
Guyed mast surpassed Poland's 646.38 m Warsaw radio mast, which stood from 1974 to 1991, to become the tallest structure.