My only critique is that the rocks in the foreground are either too close or not quite close enough. I would either leave them out, or get them a bit closer to show more detail. They are close enough now to initially attract interest, but not close enough to provide enough interesting detail once my brain has decided to go there. As a result they become somewhat of a disappointing distraction. That sounds overly harsh, which is not my intent as I like the photo. It's just that the foreground rocks are in a "middle" zone that doesn't work for me.
If you did bring the foreground rocks closer, I would lower the contrast on their detail and that would play well with the high contrast of the distant rocks and castle. I might open up the shadows and very slightly brighten the hillside beneath the castle just a bit, to lower the contrast there, but I'd leave the distant rocks as they are. I like the contrast.
I see the halo effect around the castle hill in the thumbnail, but when viewed full res I do not find it distracting.
Very nice!