Certainly showing my own prejudice:
In my experience, one of the reasons that I like certain golf courses is due to nice routings on nice land. I've been very fortunate to see many in my lifetime. The nicest land for golf to me, having learned the game in good old South FL (flat as southern Delaware!) has been rolling land.
Sticking to the USA/Canada, first, (Since true links is another aniimal) a few great examples are
Hamilton - H.S. Colt
& R Robertson
St. George's - Thompson
Plainfield - Ross (sorry to bring it up again)
Worcester - Ross (Under-appreciated)
Lehigh - Flynn (Yeah, I'm a homer, but it is a neat routing on great land)
any others in the same vein out there? Or What's your favorite, and it's OK if you like trees.