The narrator mentions OSHA, which is American (Occupational Safety and Health Administration), and there is an array of similar height towers around it, plus one much taller.
I'm guessing this is in Nebraska, or possibly South Dakota.
For a list of guyed towers in the US try this;
http://en.wikipedia.org/wiki/List_of..._United_States
For the rest of the world.....I'm not sure.