Drawings 20-29

Here is my next set of drawings that I finished a few days ago. 

I still don't really have a favorite one yet but I still have 12 more drawings to create before I need to decide which one to develop.
I feel I have drawn to many buildings rather than structures as that was what first come to mind when thinking about the this part of the project.
So for the next set of drawings, I want to draw a wider range of structures such as natural and shell,