Forest landscape with warriors Якоб Филипп Гаккерт (1737-1807)

The picture has something of this: cave, rock, water, people, geology, landscape, recreation, outdoors, mountain, canyon, nature, group, exploration, tree, river, scenic, limestone.
Perhaps it’s a painting of a group of people sitting on the ground in front of a rocky cliff with a wooden fence in the foreground and a body of water.