The lure of the Southern Appalachians is due in part to the ancient rivers and streams that carve through deep gorges, cascade over high cliffs and tumble down mountainsides into wide valleys. In the Stream Garden -- the first of three demonstration gardens along the Grand Garden Promenade -- a streamside plant community reflects this natural heritage in a formal setting. Trees, shrubs and perennials are planted around an abstract representation of a mountain stream course. The garden demonstrates how such plants, both indigenous and non-native, can be used in landscape design.