Here are some more thumbnails of various cities. I used a word stack to come up with my ideas for 'Anastasia'. It helped me a lot in terms of imagining the colours and words associated with the city.
I also did the same for the others. I wanted to experiment portraying 'Leonia' as a city in the sky. My favourites are 39 and 43. I especially love how 'Esmeralda' came out.