Ключевые слова: allegheny, appalachian, beautiful, beauty, cascade, creek, fall, falls, foliage, forest, geology, glacial, glen, gorge, green, hike, landmark, landscape, leaves, long exposure, may, mountain, mountains, natural, nature, orange, outdoors, pa, park, pennsylvania, plants, pool, rapid, ricketts, river, rock, rocks, running, rushing, scenery, scenic, small, smooth, spring, state, stream, tourism, travel, trees, usa, water, waterfall, wilderness, woods, yellow,