Both the wall and door are beautiful, and the door looks like the entrance to some fabulous paradise garden. To me, the picture at the moment is raising the question "what lies behind this door?"  It must be something fantastic to deserve such a beautiful entrance. Could you split the door terrain in two and leave it slightly ajar, to give a glimpse of what is beyond it? It could be a lush garden, a courtyard with fountains or streams, or an exotic building. Plenty of possibliities... It definitely deserves an extended scene around it to set it off.