that little spike plant doesnt fit at all. and yeah, empty, the castle looks like is floating ont he water, as if it had no base. plus the ice things comming out og the water look like there floating as well. lower them and make them taller to keep the effect.
you should go to Advanced and disable water height so you can make your water deeper. and, you basically have no sky.
Looks better as a thumpnail, but i agree, its really bad, and far to plain.
Add more doodads, and clusters.
plain terrain is plain
Too much in size - flatten the fog a bit - about to half it'S normal size
Better
And just whom is that guy on the rock? ^^
And how did he get there? Crow form, i suppose