Ehrenbreitstein and Koblenz from the Heights of Pfaffendorf William Callow (1812-1908)

The picture has something of this: landscape, water, outdoors, nature, mountain, mist, scenic, fog, river, daylight, steam, sky, weather, rock, geology, dawn, desert, hill.
Perhaps it’s a painting of a man standing on a hill overlooking a body of water with a castle in the distance and a rainbow in the sky.