Here are some ideas that might help:
* Break about half of the structure on the back.
* Put some landscape instead. a downhill with a river in the background for an example.
* Make some holes in the roof on the right.
* Exchange the arc for a simple low gate (the arc doesn't fit well in my opinion).
* I think a windmill will look pretty good with the landscape idea if you'll find a place for one.

Hope this helps,
Benny