Ключевые слова: abstract, action, active, activity, adventure, background, backgrounds, bicycle, bike, biking, cloudscape, concepts, countryside, cycle, dark, dusk, enjoying, equipment, exercise, extreme, fitness, glowing, headlamp, healthy, helmet, industrial, landscape, light, mountain, nature, night, outdoor, outside, person, recreation, ride, rock, silhouette, sky, sport, stone, summer, sun, sunset, taillight, tranquil, travel, twilight, valley, workout,