tranquil backdrop, pine forests, mountains in the background. light green lemon tones, flying birds.

abstract adventure backdrop background beautiful birds coniferous design dusk evening flying fog forest forests glare graphic green hiking hill horizon horizontal illustration landscape lemon light majestic mist morning mountain mountains natural nature outdoor panorama panoramic park peak pine range reflection rock scene scenery scenic season silhouette sky skyline summer sun sunrise sunset terrain tones tops tourism tranquil travel tree vector wallpaper