Looking good.

I'm glad the comments were useful. The explanation as the remains of the fortifications of a much older settlement makes more sense now. I also wondered about the pond to the NE. It looked to me like a place where the fortifications had been breached by some large explosion and the river had flowed through into the crater, or just where the wall had been taken down by sappers and the river had flowed through into the depression on the far side.

Looks done to me. What else do you want to do to it?