I have been building a desert city for a ttrpg adventure. If I were to have more time I would have loved to be able to do some illustrations and maps as well, but I had to focus first on people, places, and politics.
Anyway, it's getting along quite nicely. An orchard in the desert that has become an important commercial route because it has water. The desert is in the rain shadow of a mountain chain and the city is just at the base on the dry side.