I would agree with @Zorbius15.
It is a good piece but i think you can improve it by making your main point of attraction pop out more than the rest of details on the piece. I think that you were trying to keep our attention around the entrance area but my eyes keep searching this stone wall on the left part of this image and then my eyes travel to the bottom part of the image where is this weird fluorescent glow.
I would also suggest to you to darken the values of this standing ground that is closer to us a bit more. It would help your entrance to stand out more and it will help to play out athmospheric perspective as well.
You could try to make this entrance light brighter and paint more light onto these stone heads because they are very cool.
I hope this is helpful at some point, but otherwise, great work! keep it up 
