An American Cranberry bush Viburnum is past its peak. I have a baby that's about a foot tall added to the garden this summer. This native shrub and its cultivars have beautiful lacecap flowers in spring as well as nice fall color and showy, edible berries persisting throughout the fall.
There are a number of water features in the gardens including ponds, waterfalls, and this creek. The visitor guide doesn't identify the creek. Since the gardens are located on Spring Creek Road, it might be a safe guess that this is Spring Creek. It bisects the gardens east to west. There are three picturesque pedestrian bridges connecting the two sections.
Speaking of waterfalls. . .
The gardens look like they'd be beautiful in all seasons, and I hope to experience each. Only about 8 miles off the interstate, half way to Mom's, it will be a frequent stop in the future.