Updates: We got rid of the archaeological site, just focused on the ruins themselves. Decided to make a well the focal point of our scene. We want to show that there is more to the city that we aren't seeing, so we put a large important building in the background (the Observatory). Still would like mountain range in the far background and local fog settling in around the scene to keep that mysterious feel. We also introduced come banyan trees that have long roots that wrap around whatever is near it. We thought the tree could help push the point of this city being really old - having a full grown tree growing on something it shouldn't be.
Feedback: The foreground and background are contradicting each other on which is the focus. We want the foreground to be the focus but the background in our concept art is pulling focus from foreground. So we should just pick which one we would like to emphasize and run with it. It doesn't really matter which one we go with, but just pick one and stick with it.