The former Soviet Woodpecker Overhorizontal Radar played in cold war a great importance at cold war as syste for anti-ballistic missile detection. It was also well known for its enormous shortwave jammings, which sounded like the knocking of woodpeckers ( there the name).
The Woodpecker transmitters used a transmitting power of 10 MW and an enormous "highrise like" antenna systems: 150 metres high, 90 metres width and 900 metres long!
Here are some pictures of the former facility near Cernobyl:
Further pictures on
http://pripyat.com/ru/internet_photo/chernobyl_2/
More information on
http://en.wikipedia.org/wiki/Russian_Woodpecker