Conwy (Caernarvonshire) GC
It dates back to 1860s when Jack Morris (brother of Tom and Professional at Hoylake) laid out a few holes, but every time there's been a World War (two of them to be precise) it has become an army encampment, so the present layout dates from after Second World War (no credited architects). Since then some work has been done by Frank Pennink, Brian Huggett, Neil Coles, David Williams and Donald Steel. It has been enough to make it a regular R&A Championship course, to be a final qualifying course for the 2006 Open Championship and to bring me to my knees every time I play it. A course doesn't need to be a Tillie or Mackenzie masterpiece to sort the men from the boys - but it usually helps. The scenery in this case sets it apart, architecture or no architecture.