yellow birch tree leaves on blue sky background.

air alps autumn background backgrounds beauty bergamo birch blue botany branch breathing brightly calolziocorte close color colored colors como defocused design environment europe european foliage forest gardening healthy lake landscape landscaped leaf lecco lit lombardy looking mountain natural nature observation outdoors parkland part phenomenon plant point province relaxation scenery scenics season sky sunlight sunny tourism tranquility travel tree variegated vibrant view white woodland yellow