2 on my recent trip to Scotland
North Berwick - had the pleasure of playing with three members in the morning and then was paired up with some fellow Australians in the afternoon. Great weather, great company, great course, my wife was having a nice day out looking at the puffins and a birdie on the last :-)
St Andrews - managed to play 36 in one day at the old course, a beautiful sunrise at the starters hut and out at 7.30, glorious weather and some ok golf. Managed to get a nice badge on my wedge playing my second off the road. Then back out about 3 without a caddy and a father and daughter pair. The weather turned nasty and they quit after 9 so I had the surreal experience of playing all by myself, no caddy on the old course. Got absolutely soaked, got to 2 under through 12 and hung on for a couple over. The wind howled - I hit a 6 iron into the 5th for my second and a 3 iron into 18! A day I will never forget.
I really enjoy playing 36 in a day particularly on the same course - it gives you a sense of the place that a quick once around just doesn't give you.