Bill: If it is available in the areas where you travel, you should also try Belhaven brews. Only two or three are imported into the Excited States (Belhaven Ale, St. Andrews and Wee Heavy, afaik), but there are more in Scotland, of course.
Les was however perhaps referring to the non-foamy libation, the Water of the Gods. One of my dreams is to travel Scotland, capturing its beauty on format and sampling the fine amber liquids. But I am afraid the latter would limit the results of the former.