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Keywords:arid, ballast, brown, calm, clear sky, daytime, desert, dry, earth, empty, geographical feature, geology, gravel, green, hills, horizon, infrastructure, journey, landscape, mountains, natural environment, nature, open space, outdoors, peaceful, peak, rail transport, railroad, railway tracks, remote, rocky, rural, scenic, serene, shrubs, sky, slope, solitude, summit, sunlight, train tracks, tranquil, transportation, travel, untouched, vast, vegetation, warm colors, wilderness, wilderness area
