This feels washed out to me. I would suggest lowering the brightness and increasing the contrast. I think you'll like it better. I know I would. It is probably because the photo was taken mid day with bright sun. Try to shoot earlier or later in the day or try a polarizing filter if you can't.
This really looks like a neat and interesting place to visit. The blurred background looks out of place though ...like it was done in post-processing because the top of the peak on the right is blurred on the edges. The thick black border also is a little distracting...kind of boxing in a vast area. Hope that make sense. Good luck in the challenge :-)
Only four centuries? I would have imagined much more than that... but maybe I've mistaken the location.
In any case, the border could have been thinner, and the whole image is on a softer side than usually required for such landscapes. 5.