Shukhov tower on the Oka River, diagrid hyperboloid transmission tower, out of service since 1989; Nizhny Novgorod Oblast, Russia
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/5nap/">Sergey Norin</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/5nap/19678684109/">1500</a>