Tom
We have discussed this before a few times, sometimes using (loosely--my fault probably...) the term "runrigs" to decribe the phenomenon. They are clearly visible on many Scottish courses, although not on linksland (that I am aware of), probably because linksland was too poor to be used for agriculture. The furrows up here tend to run perpendicular to the line of the fairways, which is logical in that the purpose of the ridges was to retain and direct the flow of rainwater. Early golf course designers were not stupid in their use of "natural" drainage.
In a golfing sense they lead to very interesting and subtle variations in lies on the fairways which adds just the proper soupcon of uncertainty to 2nd shots. But as Gary Player says, nobody in their right mind would incorporate such a feature into a new course these days. What he didn't say is that this is to the detriment of GCA and to our enjoyment of the game.