There just had to be a Stonehenge one.
I think I'd rather go with the Orkadian whiskey.
http://cgi.ebay.co.uk/Collectors-Series-of-8-beer-mats-from-Gibbs-Mew-1983_W0QQitemZ6203810497QQcategoryZ565QQrdZ1QQcmdZViewItem you get get stonehenge pie in the redlion at Avebury (last time I went in nearly a year ago) and Excaliburgers in Tintagel!
The number of polishing stones around Avebury has taken a huge leap recently. Jim and I have been out and about and found nearly 30 now! Thats a good reason for a pint or 3!