It looks to be in the old monastery/church. There are bunk beds placed outside under a portico and there is a well just beyond the portico in the middle of a courtyard. I looks very much like a refugio.
I'd really like to stay here and would not like to miss it. I've included a couple of screenshots to help.
Of course it might not be on the Frances or any other route and it could very well be just a set they mocked up on a location for the film.
Any help would be gratefully appreciated.