The idea is good to create a more interesting and not boring kind of map, but is more hard, because you need to learn more types of themes/architectures.
The start of the map is well constructed, and smooth, but, for my taste, need more details, maybe more depth, maybe more textures, and also it need more lights in the montain part (maybe i havent adjust my gamma)
The part i most like is where there is a circle of trees, even if the terrains isnt really good (you have to do it manually and with the outline [F7] if you want better results) i like also the sky place, because of the simple it is.
in general i can notice that there are still a lot of things you can make better, like, in the futuristic place, instead of making just the shapes, you can add frames, or adding a shape to the texture, when you add shapes for the textures its more easy to complete and fill the map with them, allways with logic, and not random.