The Last castle (sketch stump) Roerich N.K. (Part 1)

The picture has something of this: water, nature, outdoors, cave, geology, ocean, sea, rock, daylight, environment, landscape, turquoise, recreation, iceberg, ball-shaped, seashore, exploration, ice.
Perhaps it’s a painting of a castle on top of a mountain with a blue sky in the background and a few clouds in the sky over the top of the picture.