Hmm, it looks like a photocollage, is it? (the mountains, the waterfall and the rocks in the foreground) ... well if it is painted, my respect.
But, if it is or if it is not (hehe, lots ot little words ;) it looks good and you combined those borders very well.
Only i dont like how the middle part of the right tile is "ending" and the waterfall-mountain looks in a way sticked on the background ... unrealistic ... unbelieveble .. well, its surreal here somebody said. ;)