Still at the shrine

 In the wall-less room, there was a small altar with the doors open. Inside was a statue of a man, god or important figure? I don't know.

 Up near the ceiling of the same room, there were paintings. From the way they have aged, I would guess them to be fairly old. This picture shows a small boat with three men in it and the moon very prominent in the background. This probably relates to some fable related to the shrine.

You can just see the above picture on the right under the ceiling. The entrance to the altar building is on the left.