Ключевые слова: antietam national battlefield, barn, cemetery, civil war barn, cloud, cloudy sky, gracvestonestomb, grass, grave, grave markers, headstone, historic barn, historic mumma cemetery, land lot, landscape, maryland, maryland usa, mumma cemetery, mumma farm and cemetery, natural environment, nature, plant, sharpsburg, sharpsburg battlefield, sky, stone wall, summer day, tombstones, tree, united states,