Old windmills are ok, but they just make ratty flour. If you want to power your disc VCRs and charge your walkman you need to turn to BP and their wind turbines.
The shot above is from Illinois somewhere on I-80. I got three turbines in this frame, but there were probably about twenty of them around a mile radius from where I was standing.
Below is a shot from Cleveland, Ohio right outside the Great Lakes science center. Because it's trunk isn't planted in the middle of a cornfield I was able to get close and upskirt the green machine.