amstel is a tough one because there are just so many climbs! the Cauberg is always packed and so you don't really see that much. Standing in Keutenberg (the village at the top of the steep section) will mean you will probably see the winning move go! The massberg is also a good spot, just after the climb on the cobbles, as its early on so allows you time to get elsewhere and see the race for a second or third time! There are so many good spots, gulpenerberg, eyesobosweg, camerig etc etc so sit down with a good map and the passage times and you should be able to watch the race 3 or 4 times! There are so many little roads in Limburg to take to cut the route but allow plenty of time they get busy on Amstel gold day!