Waterfall near Subiaco Joseph Anton Koch (1768-1839)

The picture has something of this: water, mountain, landscape, tree, outdoors, river, scenic, hill, seashore, lake, valley, recreation, rock, sky, people, nature, island, reflection.
Perhaps it’s a painting of a mountain scene with a man on a horse and a woman on a donkey in the foreground and a waterfall in the background.