Nice level! but, keep the cliff edges at the pond, i doesn't look like a pond anymore re-add the waterfall, and make a waterfall coming down from the cliffs to the pond
The problem with leaving the cliffs is this. I made it drop down a level into the ground, yet it still has waterfalls going over a edge higher then it. I'd have to re-do that base and raise the pond up a level for the waterfalls to remain.
But quite personally I think a huge freaking mini-mountain sitting in the middle of nowhere would look like crap. Also I don't exactly like the little-water area in the middle myself, shallow water p1sses me off to no end.