Ключевые слова: activities, autumn, background, beautiful, beauty, branch, bright, city, countryside, dawn, denver, environment, fall, forest, fresh, grass field, green, keep fit, landscape, light, morning, natural, nature, park, red, road, scene, scenery, scenic, season, shine, skyline, spring, summer, sun, sunlight, sunny, sunrise, sunset, sunshine, through, tree, walk, white, yellow,