Cave
Light is confusing me... Am I looking into the cave or from the cave? It seams like its the look from the cave toward the entrance, but then, light around the cave exit/entrance is not good.
Also, abused smudge tool is either his style or he's trying to cover his lack of overall details in the image. Where is that nice stone/limestone texture on those rocks? they look like marbles with smudge...
On the other hand, colors are nice (if we overlook the sudden pass from one color to another on walls, where he lost his patience with image and finished it quickly).
Water looks a bit strange with that glow on parts where it shouldn't have it (this is why lightning is confusing me so I'm not sure on which part of cave am i, on entrance or inside it...) and doesn't really look like water (little falls do to some extent)...
Its just too smudgy. Liquefied too much.