

Thanks for the insight. I think the back wall is actually glass, as you can see there is a door on the far right. It is pretty common to have an outdoor open air bathing section at hot springs, so I guess that is what is there.
I guess if one has never been to a hot spring or bathhouse before then this image could appear odd.
Thanks for being so patient with me. I wasn’t aware of the term liminal spaces, but looked into it. I guess I don’t have those feelings, but understand that some (many) people do.
If anyone else stumbles across this, I found this page insightful.