Scenic closeup of medieval stone mortar defensive medieval castle watch tower with battlements in 4k

watch tower medieval castle battlements castle parapets crenellations castle barrier arch slits gatehouse wall castle gaps castle indentations defensive architecture medieval fortification arrow loop loop hole medieval fortress historical site brick fortress looking up from below perspective stone old ancient remains preserved fortress tower balcony arch doors medieval stone landmark remnants history wall barrier wall gate blue sky sky and fortress closeup macro closeness left to right 180 degree arc entrance arc doorway fortress wall clear blue sky scenic pristine sky serene weather landscape