My suggestions: make the benches smaller, about a half of the present size. Or make the lamps much bigger. this way they are out of proportion. I also think you'd be better off putting all trees in buckets with that kind of ground. Finally, yes, what hoovie said about a walk-way. Just flatten the rocks in Y dimension (to about height of 2) and arange them. They don't have to be flush with each other.

-- erlik