Great start on it. my suggestions, with the bridge, use a different mapping mode, itll give the textures a more ealistic look. with the water fall-use a water texture with a little more noise(not too bad as is) and use a different material for the water at the bottom(just seems a little too white) maybe even go as far as to make a couple of low-to-flat terrains in the terrain editor to use for the water-give it a more rough rushing water effect. Good job on it so far.