I received E-Mail that said:
There is a castle just outside of Fort Payne, Alabama. It was built by Jeff Cook of the band "Alabama" and is called Excalibur. It is a grey stone building with 4 towers, one on each corner. It is not extremely large, but it is definitely a castle.
Later, I received E-Mail that said:
I ran across this castle a year or more ago listed for sale on http://www.dupontregistry.com. I can't recall it's list price (I want to say ~$6M, but please do not quote me on that) and it has apparently sold.