Hampstead Heath, with a Bonfire John Constable (1776-1837)

The picture has something of this: landscape, water, nature, river, sky, lake, sulfur, geothermal, beautiful, mountain, outdoors, rock, summer, reflection, cloud, scenic, thermal.
Perhaps it’s a painting of a group of people in a field with smoke coming out of the top of the hill in the distance is a castle.