Small Lake in Desolate Pass
I consider that Desolate Pass needs a small lake in that area, since many hervivors go to eat melons, and I also think that it would make the environment and the place of Desolate Pass more beautiful. Additionally, near that lake you can also implement a nest system if desired, or just leave it as a normal, small lake.
Possible Lake Location:
Desolate Pass: (X=-175538.962779,Y=-176438.878003,Z=243.11369)