We've discussed this several times before. They are a neat feature which (as Martin says) are rife in Scotland (never heard the WWII story, Martin--always thought they were remnants of the old runrig system of farming--but I could be wrong!).
Sean is right vis a vis the luck of the draw on horizontally placed furrows. The 10th at Aberdour is 530 yards, with the 2nd shot blind over a 100ft hill which peaks about 100 yards from the green. If you drive it straight and long and your ball happens to end up on an upslope, you can go for the green with some hope of success. If it ends up on a downslope, you are struggling to make it over the brow of the hill.