The North Carolina Arboretum ( http://www.ncarboretum.org/ ) is worth a visit any time of the year! Right now they have a beautiful light show for the Holidays. Check their website for the current art or science exhibition. The Arboretum is located off the Blue Ridge Parkway and just about 10 Minutes from Winghaven.
There are impeccably maintained gardens...
...and miles of trails through the woods and along Bent Creek.