So this tower called "Perrott's Folly" is allegedly Tolkien's inspiration for Orthanc. I'm...not sure I see it, other than that it's a tall, isolated tower, but okay.
Then there's this article of questionable coherence, which claims the above, and also has a picture that proves the Mail must not have even the mildest Tolkien geek on staff. How embarrassing for them. ( Curumo rants. )