I was reading House at Pooh Corner today and it started me thinking about my favorite fictional forests. I thought of:
The Hundred Acre Wood (ibid)
Arden (As You Like It)
Lothlorien (Lord of the Rings - though I suppose I like some of the others in the books as well)
Merlyn's Forest (The Once and Future King)
I'm not sure Sherwood counts since it is also real.
I'm missing some I'm sure...