I really like the perspective and lighting, and the terrain is great. I do concur with the other comments re the size of the trees..and the prominence of the strata.
John Robertson (schmeerlap) offered the following suggestion to me when my strata was too prominent and uniform: "Add Terrain > Displacement Shader > Strata and outcrops shader. At the bottom of the S&O shader parameter inputs check the Blend by shader checkbox, and click its button on the right, the one with the green cross on it (if you've got an older release it'll have 3 dots on it) and Create new shader > Colour Shader > Distribution shader. Click on that button again and Go to that Distribution shader. It'll pop up in a wee window. You can see that it has tabs for Coverage and breakup, and Altitude and Slope constraints. On the Coverage and breakup tab set the Coverage to 0.5, check the Fractal breakup checkbox, set its value to 1 and go to it via its button on the right; its window now pops up. On the Scale tab set your Feature scale to 200, and your smallest scale to 50. Click on its Colour tab have both the Apply High and Low colours checked. Bring the High colour down to mid grey (0.5). Close the wee window and do a couple of quick renders (one with Blend by shader checked, and the other with it unchecked). You should see a radical reduction of the effect of the strata with the Distribution shader and its Fractal breakup active. Play with Scale and Colour settings to get the flavour you want, but don't have your Feature and Smallest scale set too small because things'll get a bit jaggy."
Linda