Got to go with St. Andrews. At only 96 acres, most of the double fairways play in a corridor less than 400' wide and at it's narrowest - 240' wide. Especially when you consider that the greens are perhaps the largest in golf, with the double greens averaging over 40,000 sf (about an acre). The greens, divided by 18, still yield an eyepopping 20,000 per green - about 3 times the size of a typical green.
For a modern design, I second the Caledonia call. It feels so much bigger than it really is. And what's wrong with the little 9th? The chowder is a great compliment.