Not too far south from Arkansas is Monroe, Louisiana home of the Biedenharn Museum and Gardens. A small formal garden which I think is very nice. Visit their website for more information. Neat Place they have an old coke machine with the small glass bottles for only a nickle. If you come during the week look up the director and tell him you heard about the garden through Garden Web I know he frequents some of the forums.

Here is a link that might be useful: Biedenharn Museum and Gardens

Thanks for the info & link!