Here's a link to the USONIAN INN. http://www.usonianinn.com/ This website isn't wonderful as I couldn't get any pictures to open.
Here's a link to something that WILL open pictures, I think.
Here's a more high-cotton usonian, in Wisconsin.
Here's one in Illinois:
And Finally...here's one from the county where I was raised..
LAKE COUNTY OHIO has two usonians I know of. This one you can stay at and another is a private residence. Lake County also has the fewest days of sunshine in the country which is why we moved south.
This is the private residence:
The pictures in the slide show are very informative on why my entire family headed out as soon as we could. The winters are brutal. I remember driving by this house fairly regularly and knowing it was a Frank LLoyd Wright design, although the word usonian was not in my vocabulary at that time.