I took a completely different tack after having a break from the course for several months. I’m building a small city. There is only a single building type done, and the rest of the city is filled with dummy buildings. But I also completed one stretch of the road along the edge.
Here’s an isometric view:
And with an environment image from a different perspective:
I don’t dare to try it in Unity though! I have a lot of objects which are nested (e.g. street lights which still have all the curves and component parts not yet merged together, some modifiers not finalised etc).