solitary oak tree with vibrant green leaves on elevated hill surrounded by rolling green fields

solitary oak tree vibrant green leaves elevated grassy hill undulating fields clear blue sky sunset long shadows nature landscape tranquil setting rural scenery serene environment peaceful scene outdoor golden hour idyllic countryside scenic backdrop rolling hills lush greenery sunlight effects silhouette warm tones evening light quiet solitude natural beauty picturesque view eco tourism agriculture pastoral relaxing atmosphere expansive design sunlit field gentle slopes wildlife habitat horizon atmospheric perspective dusk lighting