The Shukhov Tower on the Oka River is the world’s only diagrid hyperboloid transmission tower. It is located in Russia, in the western suburbs of Nizhny Novgorod, on the left bank of the Oka River near Dzerzhinsk. The tower is one of several structures designed by Russian engineer and scientist Vladimir Shukhov; its power lines, however, were decommissioned in 1989. (Source: Wikipedia)
Shukhov Tower on the Oka River on Wikipedia.