I was driving on Sibley Road in Riverview, Michigan, today, and chanced upon this building:

Some here will object that this is a steam era building; it was built circa 1930. This is about 30 miles from Detroit, and is designed in a deco style similar to many buildings in Detroit's downtown. But what is really striking is that it is in the middle of farmland. Even though it is slightly out of period, I thought that it deserved a mention here.
This is the transmitter building for the radio station WJR. If you are familiar with the naming conventions for American radio stations, you are aware that only the earliest of radio stations had three initials; any station built after the 1920's has four call letters.
The station was built in 1925, and had a 5,000-watt transmitter, which would have reached listeners hundreds if not thousands of miles away. The station carried the broadcasts of the infamous Father Caughlan.
More information is available here:
http://www.detroit1701.org/WJR%20Radio.htmlHere's a link to a larger photo with more detail:
http://landmarkhunter.com/photos/53/78/537875-L.jpg