Gettysburg National Tower
United States
The 186th tallest tower in the world
The Gettysburg National Tower was a 307-foot (94 m) hyperboloid observation tower that overlooked the Gettysburg National Military Park and Gettysburg, Pennsylvania, from 1974 to 2000. The privately owned tower attracted many of the battlefield's visitors, who paid a fee to access its observation decks. Controversial even before it opened, the structure was eventually seized by eminent domain and demolished.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).