Wow just wow, amazing work and yet "so simple".
Imagine this but having buildings that you can get in, proper textures to have good details and a "proper city design" and even bigger.
Then get in your plane, chopper, car, jeep, truck, bike, motorbike, quad, whatever...lol...and go to other huge city in the other side of the mountains.
Epic. And more I look at the lighting more I like it.