Ok couple things: 1] If its the sea give the water a greenish tinting, 2] Its not big enough for a temple, 3] Grass and sea water DO NOT MIX!, 4] Post more Screenis, 5] Sink your trees a bit, 6] When you do increase the size post more screenies, 7] Your scale is WAY off (either those trees are tiney as hell or thats one big f***** arch-way.
Other than that....