In this landscape solution is used a cast arc, decorated with moldings, instead of columns. It looks more stylized and sophisticated.
But one should take into account the fact that such moldings and in general the whole arc of cast may not look quite harmoniously where columns are already in use. For example, in the input decision.
An additional decoration in this version is a castle stone set in the center of the upper half of the semicircle, as well as additional moldings on the sides. This allows you to give this beautiful beauty element no matter what angle you look at it.