Ключевые слова: america, background, beautiful, blue, canal, cascade, clouds, county, dc, fairfax, fall, falls, flow, flowing, george, gorge, great, green, landmark, landscape, maryland, mather, memorial, national, natural, nature, outdoor, outdoors, park, parkway, potomac, rapids, river, rocks, scenery, scenic, sky, spring, states, sunset, tourism, travel, united, usa, va, virginia, washington, water, waterfall, white,