Ключевые слова: alpine, alps, background, beautiful, biology, blue, cloud, clouds, countryside, earth, eco, ecology, europe, forest, grass, green, hike, hiking, hill, landscape, morning, mount, mountain, mountains, natural, nature, outdoor, panorama, park, peak, range, rock, scene, scenery, scenic, sky, spring, summer, summit, sun, sunrise, sunset, switzerland, tourism, trail, travel, trekking, vacation, valley, view,