Again, thanks a lot for your comments, they are really helpful.
Bob: I think I like your cropping, but I thing your verison is a bit to blue for me.
Tim: Using PS to partially ligthen up the rocks will probably help and I will try that (Bob example gives a good idea) when I have better time (I'm not that good with PS).
Bernard: Yes there is something wrong with the balance, but I'm struggeling to find a good cropping...
I have made a new (temporary) version in Lightroom (the first version was done with Bibble pro), and tried a new cropping and new adjustments of the colors.