Tanju, I don't have any idea about the camera you have used to capture this image, so I don't know whether it was possible to use a filter on your lense. If so, think that with the use of a circular polarisation filter a much better result could have been achieved, as the reflection of the sunshine could (partly) have been removed, so creating this way a more contrastful image. If not, think you've achieved the best possible result.
Love anyhow its atmosphere. Regards, Cornelius.